That's a SHOULD, not a MUST. I don't recall whether the SMTP external writer (z"l) generated message-id or whether the application needed to include it in its sysout.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Paul Gilmartin [0000042bfe9c879d-dmarc-requ...@listserv.ua.edu] Sent: Sunday, December 11, 2022 9:42 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Why email from z/OS SMTP rejected by Gmail? On Dec 11, 2022, at 17:06:52, Seymour J Metz <sme...@gmu.edu> wrote: > > What happens if you generate a message-id : header field? > Isn't the Mail Agent supposed to do that for you? Where's sendmail when you need it? Did IBM end it because it was too useful? Ironically, the z/OS UNIX Command Ref. contains several vestigial references to sendmail which IBM no longer supplies. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN