Viktor Dukhovni schreef op 7-1-2014 22:58:
On Tue, Jan 07, 2014 at 04:49:56PM -0500, Wietse Venema wrote:
R. Berger:
-The biggest problem now is that some clients can't get their email
using their exchange 2008 pop connector, because it stop after 5
messages with corrupt headers. I don't know where this comes from or to
find a solution. This is a sample header:
Wietse:
I suggest that this is a question for the Dovecot mailing list.
R. Berger:
I am not sure. Googling shows me several of the problem, all pointing to
postfix and none pointing to dovecot. The problem is the "Return-Path:
<MAILER-DAEMON>" header which is not confirming RFC2821 (I think) and
therefore refused by Exchange when delivered by the popconnector.
What concrete evidence do you have that "Return-Path: <MAILER-DAEMON>"
trips up exchange? I find this hard to believe. I recall Microsoft
having difficulties with null bytes in headers.
This is easy to verify, just set the null_sender pipe(8) option in
the LDA transport correctly, after carefully reading the pipe(8)
documentation.
I allready tried that. I have this in my master:
maildrop unix - n n - - pipe
flags=DRhu null_sender=postmas...@domain.net user=vmail
argv=/usr/bin/maildrop -d ${recipient}
