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Hi Robert
The logs I supplied were derived from "verbose_ssl = yes". I supplied the lines where it differs from regular requests and suppressed a ton of SSL output. I don't trust the Outlook logs, too, but supplied them for completeness. There are no auth issues in the dovecot log, since the TLS/SSL handshake isn't successful. (Auth works without TLS/SSL which is also an indication.) The Win8 machine was a fresh install, no firewall or antivirus, just Win8.1 from scratch + Outlook 2013.
I've seen the mailtraq forum post, too. Unfortunately the registry patch isn't available for download. I haven't seen the other (lynclog) link and will try the registry patch as soon as I have access to my win8 test machine tomorrow. Thanks for this link. I will also give the ssl_cipher_list a try, thanks. I will post my results here.
(2.1.7 is old, however since it ships with Debian Weezy I guess I'm in good company :) )
Thanks for your input Sebastian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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