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.
--
Viktor.
