Wed, Jun
4 New Articles

TechTip: JavaMail Is It!

  • Smaller Small Medium Big Bigger
  • Default Helvetica Segoe Georgia Times

I recently wrote a comment about JavaMail in the MC Press Online forums. The next day, I was asked to write a TechTip about it, and that is what you are about to read.

Let me point out that I didn't write the JavaMail program suite; James Zhang wrote it back in 2002, and I'm just making you aware of it. My goal is to explain how to install the JavaMail program on your iSeries box and how to use it to send email from within your RPG programs. It surpasses SNDDST in a number of ways:

  • It is easy to use.
  • It is easy to install.
  • It can attach objects from all over the IFS and goes beyond the 8.3 DOS naming standard.
  • You do not need to create any system distribution directory entries of any kind.
  • You do not need to know anything about Java.

Installing JavaMail on the iSeries IFS

Before we start, you must be able to FTP progams/files to the iSeries. If you have not tried this before, go to Google and enter "iseries ftp" and you should be well on your way.

  1. Download and unzip the JavaUtil.zip file. (If you use WinZip, right-click and select "Extract to here" and you'll have it unpacked to /JavaUtil/JavaMail, which is the structure used on the IFS as well.)

  2. Find the file called JavaMail.properties and open it in a text editor (Notepad or something like it). In this file, you'll find two lines:


    Leave the hosttype as it is. But you have to change the hostname to a mail server of your choice; this can be a mail server name or an IP address. (Note: If you are behind a firewall, you might have to alert your administrator that you will be sending email from your iSeries using the mail server.) When you are done, save the file.
  3. FTP all the files in the /JavaUtil/JavaMail to your iSeries. If you are using the built-in FTP program in Windows, start by creating the directories on your iSeries by entering the following on a command line:
    md '/JavaUtil' and then md '/JavaUtil/JavaMail'.
    (Note: You must create the directories in mixed case as show. Failure to acknowledge case-sensitivity is one of the most common Java programming errors.)
    Then, FTP all the files to /JavaUtil/JavaMail. When you're done, end the FTP job.
    If you use a "real" FTP program, you should be able to FTP the whole lot in one take.
  4. Download the JavaMail.savf save file. FTP it to your iSeries and restore it:
    We are running V5R3, but I have compiled all the programs with tgtrls(*PRV) so it will run on V5R2 also.

You are now ready to start using JavaMail, but first, I would like to draw your attention to the JAVAMAIL RPG program written by Mr. Zhang (in library JavaMail in source file QSOURCE). This program does all the hard work. It sets up everything and calls the Java classes. But because Mr. Zhang added an entry point, you can just use the JAVAMAIL program as a black box that you can call with a set of parameters.

Note: Normally, you have to set up some environment variables, which are like a library list to Java programs. When I first installed the JavaMail program, these environment variables really gave me problems, and I cannot say that you won't have to play around with them on your box. Look in source member JAVAMAIL/QSOURCE/STRMAIL if you encounter any problems. I modified this version of STRMAIL, so if you download the programs from somewhere else, this might vary. In the original program, you have to manually run STRMAIL and CLSMAIL before you can send email. I have added these calls to the JAVAMAIL program using QCMDEXC.

I have also included a small program called SENDMAIL that uses the JAVAMAIL program. This program works like a green-screen mail client (Figure 1).


Figure 1: SENDMAIL works like a green-screen mail client. (Click image to enlarge.)

Add the JavaMail library to your library list and enter CALL SENDMAIL from a command line. The program looks like any other mail client and works just the same.

If you want to make a line break in your text, enter Note: Every time you press Enter, the To mail field will be cleared. This prevents Mr. Woodpecker-Finger from holding down Enter and filling up somebody's mailbox within a few seconds.

I hope that you find this TechTip useful and that you can make it work. If you want to get a little deeper into it, I recommend reading Bob Cancilla's JavaMail article at IGNITe/400.

Jan Jorgensen is a programmer at Electrolux Laundry Systems Denmark, working with stuff like RPG, HTML, JavaScript, and Perl. You can reach him at This email address is being protected from spambots. You need JavaScript enabled to view it..

Jan Jorgensen

Jan Jorgensen is one of the owners of www.reeft.dk, which specializes in mobile and i5 solutions. He works with RPG, HTML, JavaScript, Perl, and PHP. You can reach him at This email address is being protected from spambots. You need JavaScript enabled to view it.




Support MC Press Online

$0.00 Raised:

Book Reviews

Resource Center

  • SB Profound WC 5536 Have you been wondering about Node.js? Our free Node.js Webinar Series takes you from total beginner to creating a fully-functional IBM i Node.js business application. You can find Part 1 here. In Part 2 of our free Node.js Webinar Series, Brian May teaches you the different tooling options available for writing code, debugging, and using Git for version control. Brian will briefly discuss the different tools available, and demonstrate his preferred setup for Node development on IBM i or any platform. Attend this webinar to learn:

  • SB Profound WP 5539More than ever, there is a demand for IT to deliver innovation. Your IBM i has been an essential part of your business operations for years. However, your organization may struggle to maintain the current system and implement new projects. The thousands of customers we've worked with and surveyed state that expectations regarding the digital footprint and vision of the company are not aligned with the current IT environment.

  • SB HelpSystems ROBOT Generic IBM announced the E1080 servers using the latest Power10 processor in September 2021. The most powerful processor from IBM to date, Power10 is designed to handle the demands of doing business in today’s high-tech atmosphere, including running cloud applications, supporting big data, and managing AI workloads. But what does Power10 mean for your data center? In this recorded webinar, IBMers Dan Sundt and Dylan Boday join IBM Power Champion Tom Huntington for a discussion on why Power10 technology is the right strategic investment if you run IBM i, AIX, or Linux. In this action-packed hour, Tom will share trends from the IBM i and AIX user communities while Dan and Dylan dive into the tech specs for key hardware, including:

  • Magic MarkTRY the one package that solves all your document design and printing challenges on all your platforms. Produce bar code labels, electronic forms, ad hoc reports, and RFID tags – without programming! MarkMagic is the only document design and print solution that combines report writing, WYSIWYG label and forms design, and conditional printing in one integrated product. Make sure your data survives when catastrophe hits. Request your trial now!  Request Now.

  • SB HelpSystems ROBOT GenericForms of ransomware has been around for over 30 years, and with more and more organizations suffering attacks each year, it continues to endure. What has made ransomware such a durable threat and what is the best way to combat it? In order to prevent ransomware, organizations must first understand how it works.

  • SB HelpSystems ROBOT GenericIT security is a top priority for businesses around the world, but most IBM i pros don’t know where to begin—and most cybersecurity experts don’t know IBM i. In this session, Robin Tatam explores the business impact of lax IBM i security, the top vulnerabilities putting IBM i at risk, and the steps you can take to protect your organization. If you’re looking to avoid unexpected downtime or corrupted data, you don’t want to miss this session.

  • SB HelpSystems ROBOT GenericCan you trust all of your users all of the time? A typical end user receives 16 malicious emails each month, but only 17 percent of these phishing campaigns are reported to IT. Once an attack is underway, most organizations won’t discover the breach until six months later. A staggering amount of damage can occur in that time. Despite these risks, 93 percent of organizations are leaving their IBM i systems vulnerable to cybercrime. In this on-demand webinar, IBM i security experts Robin Tatam and Sandi Moore will reveal:

  • FORTRA Disaster protection is vital to every business. Yet, it often consists of patched together procedures that are prone to error. From automatic backups to data encryption to media management, Robot automates the routine (yet often complex) tasks of iSeries backup and recovery, saving you time and money and making the process safer and more reliable. Automate your backups with the Robot Backup and Recovery Solution. Key features include:

  • FORTRAManaging messages on your IBM i can be more than a full-time job if you have to do it manually. Messages need a response and resources must be monitored—often over multiple systems and across platforms. How can you be sure you won’t miss important system events? Automate your message center with the Robot Message Management Solution. Key features include:

  • FORTRAThe thought of printing, distributing, and storing iSeries reports manually may reduce you to tears. Paper and labor costs associated with report generation can spiral out of control. Mountains of paper threaten to swamp your files. Robot automates report bursting, distribution, bundling, and archiving, and offers secure, selective online report viewing. Manage your reports with the Robot Report Management Solution. Key features include:

  • FORTRAFor over 30 years, Robot has been a leader in systems management for IBM i. With batch job creation and scheduling at its core, the Robot Job Scheduling Solution reduces the opportunity for human error and helps you maintain service levels, automating even the biggest, most complex runbooks. Manage your job schedule with the Robot Job Scheduling Solution. Key features include:

  • LANSA Business users want new applications now. Market and regulatory pressures require faster application updates and delivery into production. Your IBM i developers may be approaching retirement, and you see no sure way to fill their positions with experienced developers. In addition, you may be caught between maintaining your existing applications and the uncertainty of moving to something new.

  • LANSAWhen it comes to creating your business applications, there are hundreds of coding platforms and programming languages to choose from. These options range from very complex traditional programming languages to Low-Code platforms where sometimes no traditional coding experience is needed. Download our whitepaper, The Power of Writing Code in a Low-Code Solution, and:

  • LANSASupply Chain is becoming increasingly complex and unpredictable. From raw materials for manufacturing to food supply chains, the journey from source to production to delivery to consumers is marred with inefficiencies, manual processes, shortages, recalls, counterfeits, and scandals. In this webinar, we discuss how:

  • The MC Resource Centers bring you the widest selection of white papers, trial software, and on-demand webcasts for you to choose from. >> Review the list of White Papers, Trial Software or On-Demand Webcast at the MC Press Resource Center. >> Add the items to yru Cart and complet he checkout process and submit

  • Profound Logic Have you been wondering about Node.js? Our free Node.js Webinar Series takes you from total beginner to creating a fully-functional IBM i Node.js business application.

  • SB Profound WC 5536Join us for this hour-long webcast that will explore:

  • Fortra IT managers hoping to find new IBM i talent are discovering that the pool of experienced RPG programmers and operators or administrators with intimate knowledge of the operating system and the applications that run on it is small. This begs the question: How will you manage the platform that supports such a big part of your business? This guide offers strategies and software suggestions to help you plan IT staffing and resources and smooth the transition after your AS/400 talent retires. Read on to learn: