Java Smtp Server

fromServer = new BufferedReader(new InputStreamReader(System. Please help!! I have 2 window 2008 Servers, Server 1 and Server 2. Hotmail supports access via IMAP, POP3 and SMTP protocols. Send and receive emails from Java using Office365 services - testGmailPOP. SMTP (Simple Mail Transfer Protocol) is used when you set up an on-premises multi-function printer, scanner, fax, or line of business (LOB) application that needs to send email. app (aka Apple Mail) and Zimbra. com, I believe the security checks on Java callouts have recently been changed to be more restrictive so that you cannot make arbitrary outbound socket connection from within custom Java code. SMTP (Simple Mail Transfer Protocol) is the industry standard for sending emails. To import SMTP server Certificate: Change the SSL or TLS port through the NA UI. Java Mail SMTPClient Example. SMTP is a set of communication guidelines that allow software to transmit an electronic mail over the internet is called Simple Mail Transfer Protocol. Applies to All Versions of SmarterTrack. telnet server. in: Most important is Common Name, in our example it is set to smtp. It can send mails without a relaying SMTP mail server. With SMTP AUTH enabled senders who wish to relay mail through the SMTP server (that is, send mail that is eventually to be delivered to another SMTP server) must authenticate themselves to Apache James Server before sending their message. The IIS SMTP service performs no relaying at all. We already discussed the fundamentals of Java Mail API. An SMTP protocol provider for the JavaMail API that provides access to an SMTP server. net package, so be sure to say import java. There are some more differences between SMTP and POP3 which I have discussed in the comparison chart shown below; please have a look. This is not a full-blown server application like Haraka but an easy way to add custom SMTP listeners to your app. This classic JavaWorld tutorial presents an introduction to sockets programming over TCP/IP networks and demonstrates how to write client/server applications in Java. I've gotten it to work, up to the RCPT TO: portion. Properties) as part of the java. Others protocols are existing (Exchange by example), but I don't know much about it. I just tried to send an e-mail from a gmail account and this was the server response 501 501 5. Sending via SMTP in Different Languages. SMTP is an internet standard for electronic mail, i. SendGrid is the leader in transactional email delivery. However, an interesting feature found in mailsend that is not available on other command line email sending tool is the ability to show SMTP server information by using the -info option. Accept the agreement and click next. Point Nmap at a remote machine and it might tell you that ports 25/tcp, 80/tcp, and 53/udp are open. Properties; import java. make sure you are running smtp. SMTP authentication is the process in which ISP clients identify themselves to the mail server from which they are going to send an email. Because the SAS Mail Service relies on this single configuration location, if the SMTP mail server changes, you can modify the appropriate settings in a single place. The basis is that with Java we can communicate through a socket which is connected to the server's SMTP port (usually port 25). Sending email using SMTP and Java. You can change the default SMTP from port 25 to 2525 on most of the email applications - you will need to refer to the documentation of the email client that you use for more information on how to specify different SMTP port for your outgoing email connection. Contact our admins and they will help you install and configure your SMTP server for you, for free. Gmail provides SMTP service that you can use to send out emails from your WordPress site. We recommend you set up Sender Policy Framework (SPF) and/or Domain Keys Identified Mail (DKIM) for your email domain. If you're using a different service to send your mail such as Google Apps, Yahoo, or Rackspace (often called an SMTP server), then you need to configure an Outbound Mailbox in Desk. the outgoing mail server of the respective e-mail provider. Brooks, Jr. SMTPサーバー 読み方:エスエムティーピーサーバー 別名:SMTPサーバ 【英】SMTP server SMTPサーバー とは、インターネットやイントラネットで電子メールを送信・転送するために用いられるプロトコルで、現在もっとも普及しているSMTPに対応するメールサーバーのことである。. This component can be used in almost any kind of email processing application. In Outlook Web App, click Settings settings > Options > Account > My account. Just add the -Dmail. The following page just contains a link to a nice Fake SMTP server that can be used to test email client software. If you have more than one server instance, edit the server. We’ll disable Anonymous access and enable “Basic Authentication”. not localhost) I'd check with your hosting provider whether they enabled some sort of firewall that blocks connections on the SMTP port (port 25 usually). In old jboss (version 4), there is a mail-service. Use the SMTP Server provided. NET uses an SMTP server on the local computer. FtpLoginException: Invalid username/password, but the mail is already sent. All Hotmail servers (POP3 and SMTP) use implicit SSL (use ConnectSSL method). This setup not only prevents the mails from delivering to the email addresses but also sends the emails to invalid email addresses. Trouble is I am finding it dificult to find a server that does this. Java Apache Mail Enterprise Server also is known as Apache James. SMTP connections secured by SSL are known by the shorthand SMTPS, though SMTPS is not a protocol in its own right. JavaMail API - SMTP Servers - SMTP is an acronym for Simple Mail Transfer Protocol. I have configured js. configure mail session and smtp in standalone. A client create new message by using Message subclass. To modify the settings for the Java Mail Session (for example, if the host name of the SMTP mail server changes), edit the SAS-configuration-directory\Levn\Web\WebAppServer\SASServer1_1\conf\server. System: The SMTP server requires a secure connection or the client was not authenticated. It has the same simple text conversation that my e-mail client had with the SMTP server for HowStuffWorks, and gives the message to the Mindspring server. start() The following are Jave code examples for showing how to use start() of the org. When I send mail with a sample Java mail client code, it works fine if the mail is to be delivered locally (to an account on the mail server itself), but SendFailedException occurs if the mail is addressed to someone not on the mail server. This post tells you how to set up Gmail as an SMTP server for your gallery, including how to set things up when your Google account is configured with 2-factor authentication. Java Project Tutorial - Make Login and Register Form Step by Step Using NetBeans And MySQL Database - Duration: 3:43:32. Note: Here we have used the localhost SMTP server for sending emails. No, The Apigee Edge service does not include SMTP service. To import SMTP server Certificate: Change the SSL or TLS port through the NA UI. GNU/Linux (KDE) Copyright © 2015. start() The following are Jave code examples for showing how to use start() of the org. 5 A 100% pure java based smtp / POP3 mail server that supports plugins. Configure your application to use "localhost" as your SMTP server, and all emails will be intercepted and displayed in this software. You also need to get the following additional information:. SMTP server on Android Devices The intended post here is to give some help instruction of the usage of the simple SMTP application which runs on Android Devices. This tutorial covers the configuration of a Linux email server using the Sendmail MTA (Mail Transfer Agent). Download now: Size: 659KB License: GPL Price: Free By: Eric Daugherty: calvin's e-mail server Beta 1. SMTP (Simple Mail Transfer Protocol) is the industry standard for sending emails. It binds a dummy SMTP server that listens on whichever port you want (it means that those mails won't be really sent) and on which you can setup Nuxeo to send outgoing mails: when the server sends a mail, it shows up into the list of received emails. The Java application runs periodically to process each e-mail message stored in the folder mentioned previously. Unless mail. Core of sending email is done by JavaMail api (using GMail) and we just need to pass the required email parameters to it. Before you start, review the instructions in Before You Begin with Amazon SES. enable="true" paramter to that command and you should be good to go. Customize the value of the mail. The PHP configuration for sending e-mails was then relatively simple (php. In response, the server sends some predefined response code to the client. I stopped hosting it because i got this error: 'java. Our SMTP servers are now able to accept your messages and they will be routed to the Postmark mail queue. 1, so it can only send emails which originate on the server itself. In my Seam application I needed a local smtp server for testing the email facilities Seam offers. You can send 500 emails each day through the Gmail SMTP server when logged into their web interface. We will use javax. But if you are self-hosting or can’t use the available SMTP server for whatever reason, Gmail provides one you can use to send up to 2,000 messages a day. com to send emails from their Spring Boot apps. After a determined period, however, the message is returned as undelivered. If you want to use any email sending client like Gmail, Yahoo. SMTP (Simple Mail Transfer Protocol) is the industry standard for sending emails. No, The Apigee Edge service does not include SMTP service. Your server must support RFC2554 in order for this to work. com 2) Port: our_port_no. Useful for testing/debugging software that generates email. Setting up for Faxback server usage. If we do not have access to those credentials, Google provides public access to Gmail SMTP server through our Gmail account. So, you need to identify the appropriate SMTP server. mail, available here) is a great library for sending/receiving mails straight from a Java code. This is how I did it : Settings > System Settings > Mail Server Settings. We’ll disable Anonymous access and enable “Basic Authentication”. Extract the zip contents and ensure that the extracted jar commons-email-1. the outgoing mail server of the respective e-mail provider. txt, where MM is the month and DD is the day. SMTP port Enter the port used to connect to the SMTP host. SolarWinds ® Server & Application Monitor (SAM) is designed to proactively monitor SMTP server and its ability to accept incoming connections and respond with the correct code. After enabling access, you will be able to connect to smtp. Atlassian Confluence, Secure SMTP, and JNDI. It is used for Continuous Integration. This project exists for everyone who is interested in running their own email server quickly and easily. Encryption: Select the type of Encryption - SSL/TLS mail encryption which is now supported for mail alerts. telnet server. Apply one of the following techniques to get one: Install a SMTP server such as Postfix Server or Apache James Server. Mock SMTP server implements basic features of SMTP protocol; instead of sending actual emails it keeps internal storage of incoming messages that can be accessed and retrieved later on. Is it necessary to use an e-mail server to send e-mails? I have a web site that will send e-mails and if possible I'd like to send the e-mails directly from the web site code without using an e-mail server. A SMTP server in Java for unit test By Sébastien Lesaint February 15, 2014 Comment Tweet Like +1 If you ever had to write code that uses JavaMail to send emails, then you necessarily looked for a way of testing that code at some point. How do I use SENDMAIL to send email from MATLAB 7. Once the dependencies are set up, simply copy the above examples and start mailing!. The server then relays the mail through a sequence of SMTP servers and mail transfer agents (MTA) to get to its destination. info/ (see the about page information about the service, or statistics about sites checked with their service). For this purpose, you must have SMTP server that is responsible to send mails. Since we use the smtp from office 365 with office 365 we have some troubles. I summarized many articles and corrected some errors. edu as the outgoing email server. SMTP Server with Scalable Email Delivery. JavaMail – GMail via SSL. We can either install an SMTP server or access SMTP servers provided online. It prefers immediate SSL negotiation followed by SMTP (old style SMTP over SSL) Eudora and Zimbra. Before you start sending emails you need to configure your SMTP server and set properties according to our requirements. Please let me know if Apigee provides any smtp server configuration in-built. The Postfix Home Page. Last updated 24 July 2019. When ever i send email to individual ID its going properly. A client create new message by using Message subclass. Configuring Windows SMTP Server on Windows 2008 for Relay Posted by Mark Michaelis October 23, 2010 October 25, 2018 11 Comments on Configuring Windows SMTP Server on Windows 2008 for Relay My SMTP mail server requires that email be sent with TLS encryption and on port 587. Java Email Server 1. Click on next button. This article introduces how to configure email session in JBoss AS 7. I use Incredimail as an email program and most ISP’s don’t have any information on how to configure settings in that program. You can update your configuration using our SMTP server, one of the supported ports, and simply authenticate with your credentials (API key, secret key). Here are some of the benefits you get with a Linux mail server: Extremely fast, reliable, secure and scalable. Before you start sending emails you need to configure your SMTP server and set properties according to our requirements. I wanted to isolate the email notification portion. Here’s some of the code that I created for SMTPConnect. With build in EMLFile class you can later read those emails and verify them in your automation testing project. program sends the commands to the terminal. com, try ping smtp. Port 25 will incur a connection delay of around 20 seconds, so use port 525 if you wish. Setting SMTP Mail server connections in Cognos Configuration in UNIX environment: Hi All, Please let me know the commands and steps to make configuration changes to include the SMTP mail server settings - on the cognos server hosted on UNIX platform. SMTP Server Settings for Yahoo Mail The SMTP server settings apply to outgoing mail, so they're the same whether POP or IMAP is used for incoming email. SMTP server is used for sending emails. Download smtp-1. SMTP is the Simple Mail Transfer Protocol, the most recent standard of which is defined in RFC 5321. This Example shows you how to create a SMTP Client using javamail api. 2 or later you would use the JavaMail API (A pplication P rogramming I nterface). Anything beyond that set of basic requirements would be a bonus. Enable the protocol log: Get-receiveconnector | Set-receiveconnector -protocollogginglevel verbose. While having basic protocol support, is aimed to manage heavy traffic also in a burst modality. Below are instructions on how to test SMTP AUTH against a mail server using Telnet and entering the commands by hand. com is a bulk email service provider. If you have more than one server instance, edit the server. Right-click the project node and select New > Java Class. In response, the server sends some predefined response code to the client. in)); to Server = System. you can't sent the command to the smtp host because you don't have the permission on the smtp server. I am getting the following exception com. A solution would need to support SMTP, as both the ColdFusion and Railo application servers are configured to talk to an SMTP server. Since April 2017 the JavaMail API is available as an open source project on GitHub. This means the server you are trying to send to is blocking mail sent from your server. >> "Mail Error: SMTP server rejected auth: 220 smtp. Username / Password: Turn on SMTP authentication and enter your account's SMTP username and SMTP password. It is a pure Java implementation (built on Spring Framework) and supports all the standard e-mail protocols such as SMTP, POP3 etc. We're hoping we can find a Linux SMTP server that can do something similar to what the IIS SMTP service is doing on our existing Windows server for this application. How to work with Java Mail API in Android In this article will learn how we can make use of Java Mail API to send Mail in Android automatically and also some details about fetching email-ID’s from the Android device that is configured for mail service. In all previous chapters we used JangoSMPT server to send emails. Ping your smtp server or telnet to check the user login credentials. Core of sending email is done by JavaMail api (using GMail) and we just need to pass the required email parameters to it. Attachments can also be added to the email. 1 Authentication Required. If you use our server as the SMTP server in your email program, then we act as the email broker between your computer and your email recipients. Outgoing server name: send. That is certainly true, but in this case I was referring to the fact that advanced firewalls watch for port scanning-like activity and will report such activity to the network administrator along with your IP address. Microsoft Exchange: make sure that your exchange server is configured to allow smtp relaying either for trusted IP addreses, or for users that are authenticated. In addition, you must configure an initialization parameter, SMTP_OUT_SERVER, to point to an outgoing SMTP server (unlike UTL_SMTP, this is not specified in the function arguments and must be pre-defined). We can either install an SMTP server or access SMTP servers provided online. js which provides extremely high performance coupled with a flexible plugin system allowing Javascript programmers full access to change the behaviour of the server. Before posting, please search the forum to confirm that it has not already been suggested. Message; import javax. d/hudson script (you'll need to prefix the edit command with sudo) and you will see a similar java command to the one you listed above. We use an application to signate invoices for our customers. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. The server does not send out any email. SMTP Proxy server is a very useful utility if you are trying to debug problems with your email server. In this chapter we will learn about SMPT server provided by Gmail. I’ll leave this as an exercise for the reader. We will use javax. in: Most important is Common Name, in our example it is set to smtp. Read the logs: DEBUG SMTP: got response code 454, with response: 454 5. This gives a lot of verbose output, don’t worry 🙂 When the connection is made, you’ll notice an SMTP. Configure Authenticated SMTP (SMTP AUTH) Authenticated SMTP is a method of securing your SMTP server. 7 or greater. Learn more at. To begin with, to send emails from an Java Application, we need an SMTP server. Lab 2: A Mail User Agent in Java In this lab you will implement a mail user agent that sends mail to remote hosts. After a bit of looking, I decided to use FakeSMTP. Anything beyond that set of basic requirements would be a bonus. But there should be some configuration on the java stack for mail notification. An email configuration file (to run the example, substitute valid values for the uncommented items):. SMTP (Simple Mail Transfer Protocol) is the industry standard for sending emails. Ensure the sending address is appropriate. the server has connectivity to an internal smtp server but i am enable to configure. GreenMail standalone examples Test setup for SMTP/IMAP and one user Starts GreenMail for SMTP (test port 3025) and IMAP (test port 3143) using localhost/1271 and a single user test1 with password pwd1 and email [email protected]:. i want create java mail application but when i read sample programs there is smtp server String mailHost = "your. • Port - SMTP uses port 25 by default, but you can change it in case your SMTP server uses different port. Escape character is '^]'. Here are the SMTP settings as per Google Outgoing Mail (SMTP) Server - requires TLS: smtp. In this situation unit testing of our email program is difficult task. Use our SSD-powered, optimized and secure servers to run a SMTP mailserver. Postfix is an alternative SMTP server that performs the same tasks as "sendmail". We provide detailed API documentation, and in your account on the SMTP service you’ll find all the personal settings you need for the SMTP server. Sending email in java using Gmail SMTP and JavaMail API is fun. mail has all the required classes for sending emails an other mail protocols like SMTP, POP3, and IMAP. The server does not send out any email. Languages like PHP, Perl, and Java have packages which will connect directly to a remote SMTP server. In most cases, enter the SMTP settings in the Settings section of the client interface when you add the Yahoo account to it. About SendEmail SendEmail is a lightweight, command line SMTP email client. Postfix is an alternative SMTP server that performs the same tasks as "sendmail". After a determined period, however, the message is returned as undelivered. subethamail. Post SMTP is the first and only plugin to support the latest security standards. Use port 465, or port 587 if your client begins with plain text before issuing the STARTTLS command. Andy, There's no reason to be unsettled by this log entry. Use the ability to fully integrate our SMTP server into your CMS, CRM, or other system and then send e-mails to your customers from your own online system. Unit Testing Java Email Code with Fake SMTP Server. There are many options for SMTP service providers, but Mailgun offers some of the most flexible options available for a good SMTP relay. In all previous chapters we used JangoSMPT server to send emails. Sometimes is required to test if the application is able to connect with a mail server to send emails. You can update your configuration using our SMTP server, one of the supported ports, and simply authenticate with your credentials (API key, secret key). Some hit the UnknownHostException: smtp. telnet to port 25 on a remote host and type mail in from the command line using the SMTP commands. The procedures in this article may also apply to other SMTP servers that provide secure SSL/TLS access. Trouble is I am finding it dificult to find a server that does this. It just presents an interface for client software to connect and post email messages. I don't believe it is possible to configure GMail as your SMTP server for Confluence solely through the administration console because there are some file level changes that need to be made to setup the JNDI mail session for Confluence but you can read about configuring GMail as an SMTP server for your Confluence instance in this document. Configuring Tomcat mail. Normally, these would be configured to connect to a relay server as described above. server that is sending the emails. Using Gmail as SMTP server from Java, Spring Boot apps By Mohamed Sanaulla on September 15, 2017 • ( 2 Comments ) Gmail users can use Gmail's SMTP server smtp. Choose language:. Future releases will be done as part of the Eclipse project for JavaMail. This gives a lot of verbose output, don't worry 🙂 When the connection is made, you'll notice an SMTP. Using its nmap-services database of about 2,200 well-known services, Nmap would report that those ports probably correspond to a mail server (SMTP), web server (HTTP), and name server (DNS) respectively. SendGrid's SMTP API allows developers to specify custom handling. js which provides extremely high performance coupled with a flexible plugin system allowing Javascript programmers full access to change the behaviour of the server. Sending email in java using Gmail SMTP and JavaMail API is fun. The process is described on the Configuring an SSL connection to Active Directory page. KB Home | No SMTP server defined Share: When setting up PaperCut 's Email Notifications customers may experience an issue when using some types of Antivirus/Malware software that intercepts SMTP connections. Java Mail SMTPClient Example. Choose your destination folder and click next. trust is set. This component can be used in almost any kind of email processing application. If you use our server as the SMTP server in your email program, then we act as the email broker between your computer and your email recipients. This port number is usually 25. 1 Sender address rejected: not owned by user This means you are not using the correct outgoing (SMTP) server authentication settings. SMTP server: mail. Since I run a windows 2003 server at home anyway I thought I would stick an SMTP server on it. If SMTP is set to the "SysMMDD. This is more of java mail question. SubEtha SMTP is a Java library which allows your application to receive SMTP mail with a simple, easy-to-understand API. In this tutorial, you'll install and configure Postfix as a send-only SMTP server on Debian 10. This project exists for everyone who is interested in running their own email server quickly and easily. inf;; Symantec IDS Driver INF File;; Copyright (c) 2019, Symantec Corporation; [Version] signature = "$Windows NT$". Learn more at. In this chapter we will learn about SMPT server provided by Gmail. To perform the SMTP telnet test, in addition to mailer node, you will also need to know on which node is the SMTP server (this is mailer “outbound server” parameter), and what is the reply to address that is set up for the java mailer (this is mailer “reply to” parameter). SMTP server supports explicit SSL (you can use Connect method and then secure the channel using StartTLS method) IMAP. Create custom SMTP servers on the fly Latest release 3. JavaMail sends e-mails using an e-mail server, typically through the SMTP interface of an e-mail provider. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. To modify the settings for the Java Mail Session (for example, if the host name of the SMTP mail server changes), edit the SAS-configuration-directory\Levn\Web\WebAppServer\SASServer1_1\conf\server. What's more, I configure the SMTP service to relay all emails to a downstream SMTP service which can send emails out to the Internet. com and you wish to test SMTP connectivity use port 25 or 525. SMTP Server Information. 07/02/2012 08/02/2012 ahmad hashem Leave a Comment on How to send Mail using SMTP Protocol in Java without using JDK JavaMail API How to send Mail using SMTP Protocol in Java without using JDK JavaMail API. The following is a simple example that illustrates the different portions of a server/client pair. Assumptions:Customer has a working O365 Tenant. Explain POP, SMTP and IMAP protocols. Sendmail by itself as the name suggests is a MTA. Configure Outbound Email for Desk. It accepts all email messages and stores them in memory. If the java web application is residing on the same server, then you can use localhost as the email server within the application. It acts as SMTP server saving all email messages as EML file to disk. JavaMail does not implement an email server, instead it allows you to access an email server using a Java API. Web is crammed with basic examples how to use it. You could use only authorized box to send and receive an email. How to work with Java Mail API in Android In this article will learn how we can make use of Java Mail API to send Mail in Android automatically and also some details about fetching email-ID’s from the Android device that is configured for mail service. It is written in Java. SMTP Server Create SMTP and LMTP server instances on the fly. A Java EE IDE and Application Server such as GlassFish or Oracle WebLogic Server. By Kevin Saitta, Most of the time the SMTP port for a server is usually 25 but check with your email administrator first to get. Need help? Post your question and get tips & solutions from a community of 435,068 IT Pros & Developers. Configuring Windows SMTP Server on Windows 2008 for Relay Posted by Mark Michaelis October 23, 2010 October 25, 2018 11 Comments on Configuring Windows SMTP Server on Windows 2008 for Relay My SMTP mail server requires that email be sent with TLS encryption and on port 587. Sending email from java is an easy task. You can use our SMTP interface or one of the AWS SDKs to integrate Amazon SES directly into your existing applications. It helps you see all communication between a client and the server and is very useful if you are trying to find problems with your email server or a client that you wrote. I have been working with NIO since last 2 years and would like to share simple Server-Client code for my readers who are free to use this code in their production environment. To send an email using the Amazon SES SMTP interface, you can use an SMTP-enabled programming language, email server, or application. Configure Your SMTP Relay In Minutes. JES is a multi-featured hybrid MTA/MDA server written in the java programming language. Properties) as part of the java. JavaMail does not implement an email server, instead it allows you to access an email server using a Java API. The SMTP server will not involve other external servers fordelivery if both sender and receiver has the same domain address. Jodd Core tools and huge number of. Atlassian Confluence, Secure SMTP, and JNDI. In order to test the code presented, you must have access to an email server. Read the logs: DEBUG SMTP: got response code 454, with response: 454 5. The Heroku platform makes it easy to send emails through a suite of add-ons that act as backing services - that can be attached to your app to provide the service. net package, so be sure to say import java. About SendEmail SendEmail is a lightweight, command line SMTP email client. 0 using the Simple Mail Transfer Protocol (SMTP) server from the Google G Suite to be able to send emails. JavaMail example - send mail in java with image Since we can create HTML body message, if the image file is located at some server location we can use img element to show them in the message. where should i add these java files and compile them. This field can be found in the 'Configure' options for a given Mail Prevent server. SMTP server supports explicit SSL (you can use Connect method and then secure the channel using StartTLS method) IMAP. SMTP Server Settings for Yahoo Mail The SMTP server settings apply to outgoing mail, so they're the same whether POP or IMAP is used for incoming email. jodd:jodd-core. JES is a multi-featured hybrid MTA/MDA server written in the java programming language. Next, you begin to communicate directly with the software that accepts connections on the specified port. mail, available here) is a great library for sending/receiving mails straight from a Java code. Read the logs: DEBUG SMTP: got response code 454, with response: 454 5. After enabling access, you will be able to connect to smtp. Provide an Open Source Java Email Server that supports POP3/SMTP. Default is infinite timeout. Sending helo command is a good idea. Make sure you confirm the correct port number. There are a couple ways to do this, the example below uses Perl:. How to use Free Google SMTP Server. You can use one of the following techniques to get the SMTP server: Install and use any SMTP server such as Postcast server, Apache James server, cmail server etc. To begin with, to send emails from an Java Application, we need an SMTP server. Firstly, you will need to import the SMTP server certificate into a Java keystore.