Dnia 9.12.2020 o godz. 06:04:58 @lbutlr pisze: > > /etc/aliases works for incoming email. > > No, that is definitely not correct. It works for internal local mail as > well, otherwise I would never see mail sent to root.
But what is important is that /etc/aliases applies when mail is *received*, not sent. In this context it's "incoming" mail. It doesn't matter that it is both sent and received on local machine. /etc/aliases ensures that eg. mail sent to "root" goes to "mysuer". But it doesn't help if you want mail sent *from* "root" have in "From:" field something like "root-machineA". And that's what OP wanted. He wanted to be able to distinguish messages sent from "root" on different machines, where each sender address is the same "root@domain", by somehow including machine name in the "From:" header. /etc/aliases won't help in that. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub."