25 years of Postfix

Posted Dec 19, 2023 20:22 UTC (Tue) by Wol (subscriber, #4433)
In reply to: 25 years of Postfix by brunowolff
Parent article: 25 years of Postfix

> auto replies used for out of office messages being sent to the from address instead of the envelope sender address,

Which program is supposed to send the "out of office"? If it's the mail CLIENT, it doesn't have access to the envelope sender? So it's going to send it to the "From" address, because that's the only address it's got.

While the MTA - which does have access to the envelope address - surely shouldn't be sending an OoO?

Cheers,
Wol

25 years of Postfix

Posted Dec 19, 2023 20:33 UTC (Tue) by fenncruz (subscriber, #81417) [Link]

Given the number of times I've seen out of office replies cause chaos on mailing lists, I don't think anyone should be sending them.

25 years of Postfix

Posted Dec 20, 2023 1:22 UTC (Wed) by brunowolff (guest, #71160) [Link]

Typically it isn't a mail client. It might be the MTA or it might be a delivery agent (e.g. maildrop or procmail). Typically the delivery agent has access to the envelope sender address via some mechanism. Also the delivery agent will typically add a return-path header that you can see in a mail client.