Bob Proulx:
> I have an account on a host machine that receives email from a mailing
> list. That account then uses procmail to forward some messages to a
> different account on a different host machine.
>
> :0
> ! u...@example.com
>
> All fine for the most part. But infrequently someone posts a message
> to the mailing list with an invalid domain name in the From: field.
> This is accepted by the mailing list and delivered to the list
> members.
>
> From: Some User <user@invalid>
>
> This case is mailed but the From: line is changed to be the account
> user owner of the forwarding process. The result shows up in the
What clobbers the From: header? Postfix does not, because otherwise
you would not have received it that way, and the Postfix sendmail
command does not care what is in the From: header.
Wietse
