Extra lines are inserted into the received SMTP mail message when the mail is submitted via an IEBGENER batch job

Cause

In the IEBGENER batch job, the message header and message body in the DATA section are NOT separated by an empty line. According to RFC 2822 (section 2.1), the message body in the DATA section is "a sequence of characters that follows the header and is separated from the header by an empty line."

If this rule is not followed, the extra lines could be inserted.

Here's a sample IEBGENER job that would create the extra lines:

//SENDNOTE EXEC PGM=IEBGENER
//SYSIN DD DUMMY
//SYSOUT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//SYSUT2 DD SYSOUT=(B,SMTP)
//SYSUT1 DD *
HELO test
MAIL FROM:<test_mail@test.com>
RCPT TO:<test_mail@test.com>
DATA
TO: Jane Doe
FROM: John Doe
SUBJECT: Test Email
Test Line 1
Test Line 2
.
QUIT

The received mail body would look like:

Test Line 1
Date: Thu, 03 Jan 13 12:16:09 EST

Test Line 2

To fix this, insert an empty line between the header and the message body in the DATA section in the IEBGENER job:

//SENDNOTE EXEC PGM=IEBGENER
//SYSIN DD DUMMY
//SYSOUT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//SYSUT2 DD SYSOUT=(B,SMTP)
//SYSUT1 DD *
HELO test
MAIL FROM:<test_mail@test.com>
RCPT TO:<test_mail@test.com>
DATA
TO: Jane Doe
FROM: John Doe
SUBJECT: Test Email

Test Line 1
Test Line 2
.
QUIT