This FAQ is designed to answer common questions about sending e-mail from MVS.
What are my options for sending e-mail from MVS?
What is SMTP? What is its purpose?
What is RFC822?
What is MIME and why is it important?
What does a SMTP data stream consist of?
How can I send attachments?
How can I prevent users from pretending to be someone else when they send mail?
How does SMTP-Send insulate me from the various Internet Protocols?
Where can I get more information about the IBM SMTP Server?
Do I have to use the IBM SMTP Server?
My SMTP server doesn't recognize the @ character in my e-mail addresses. How can I send mail?
How can I get my SMTP Server to relay all mail to another SMTP mail server?
How can I get my SMTP Server to relay all mail to another SMTP mail server?
The SMTP server can be instructed to relay all outgoing mail for which it cannot locate the host to another SMTP server. If the SMTP server is configured to not resolve any addresses, then all recipients will be unknown and you can direct the mail to another server.

1. Copy your TCP/IP profile data set (DDname SYSTCPD in the SMTP started task) to a new data set.
2. In your SMTP CONFIG data (DDname CONFIG in the SMTP started task) specify a IPMAILERADDRESS statement. The syntax is IPMAILERADDRESS xx.xx.xx.xx where the xx.xx.xx.xx is the numeric IP address of the target SMTP mail server.
3. Comment out the NSINTERADDR statements in the copied SYSTCPD data set. This will prevent the SMTP server from using Domain Name Services to resolve the location of any e-mail address. SMTP will now only use the site table to resolve e-mail addresses into target host IP addresses.
4. Change your SMTP started task JCL to use the altered copy of the TCP/IP parameters and the updated CONFIG data set .Restart your SMTP server. Any mail for which the IP address of the target host cannot be determined will now be redirected to the SMTP server named in the IPMAILERADDRESS statement.
5. Or you can use SMTP-Send's Spool Server and skip steps 1 through 4.