Your question has an assumption contrary to fact. Just because you get a 220 response doesn't meant that the message has been delivered. In fact, it doesn't even guaranty that the destination mailbox is valid; the receiving server could relay the message to another server that checks addresses; and, yes, such configurations exist, whether they should or not.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Grant Taylor <[email protected]> Sent: Friday, August 28, 2020 10:31 PM To: [email protected] Subject: Re: Sending email from the Mainframe On 8/28/20 5:44 PM, Seymour J Metz wrote: > Doing a direct to MX session will let you see rejection messages, > but your firewall may not allow that and even if it does you could > get a subsequesen DSN. If you are the sending system, you would be the one to generate said DSN. So ... why would you generate a DSN when you already know that the recipient is not valid. -- Grant. . . . unix || die ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
