On 19.6.2013, at 20.54, Ricardo Machini Barbosa <ricardomach...@gmail.com> wrote:
> I am trying to do a proxy with dovecot to IMAP backend server that are using > Microsoft Exchange 2013. > I already did this with Microsoft Exchange 2007 and Microsoft Exchange 2010 > and it works perfectly! But with Microsoft Exchange 2013 I can not perform > LOGIN. > > The error log message is: > /imap-login: Error: proxy(u...@domain.com.br): Login for > exchange2013.domain.com.br:143 timed out in state=4 (after 30 secs, > local=x.x.x.x:59640)/ > > My troubleshoot was: > > - tcpdump on dovecot server side: > I can see the commands sent/received by Microsoft Exchange. But no the "OK > LOGIN" response. > > /* OK The Microsoft Exchange IMAP4 service in xxxx is ready.// > //C CAPABILITY// > //L LOGIN "u...@domain.com.br" "123456"// > //* CAPABILITY IMAP4 IMAP4rev1 AUTH=PLAIN STARTTLS UIDPLUS CHILDREN IDLE > NAMESPACE LITERAL+// > //C OK CAPABILITY completed./ Looks like Exchange 2013 IMAP has broken command pipelining :( See if it gets fixed by http://hg.dovecot.org/dovecot-2.2/rev/6e8bbc150fa9 and the attached patch on top of that? If it works, I'll commit that patch too.
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