Von:Martijn Brinkers via Users
Gesendet: Mittwoch 21 Februar 2018 09:07
Betreff: Re: [Djigzo users] mail forwarding loop
On 20-02-18 18:41, Stefan Günther via Users wrote:
after running a couple of days, the ciphermail
system at a customers
site complains about a mail forwarding loop. The customers says that
they didn't change anything, which seems to be true according to the
timestamp of the configuration files.
Even by running the smtpd daemon in verbose mode, I cannot figure
ouut, what causes the problem. It seems to occur, when the email is
reinjected by ciphermail (Version 3.3.1-0):
Hard to tell from the logs. It looks
like this system is configured to
accept local email, i.e., user mailboxes are stored in the system. The
email is delivered to the mailboxes using the local daemon process.
according to http://www.postfix.org/local.8.html
the local delivery
daemon has a loop detection mechanism using a Delivered-To header.
Perhaps the message already contains a Delivered-To header?
"In order to stop mail forwarding loops early, the software adds an
optional Delivered-To: header with the final envelope recipient
address. If mail arrives for a recipient that is already listed in a
Delivered-To: header, the message is bounced."
Is the email forwarded from some mailbox (for example with Fetchmail?)
this has been working for a couple of days, I have the suspicion that