[Dovecot] outlook problem if TLS mailsettings are off

[Georg Käfer]

No success. 
I Disabled all firewall rules (enabled for subnet globally all tcp/udp/icmp ports) on firewall appliance and also on PC's I'm testing it with.

Also further tests showed that is not an outlook specific problem for me, also thunderbird shows same behaviour.
If I turn TLS in mailclient on - mails in preview get displayed
If I turn TLS in mailclient off - mails in preview get not displayed (also opening mail by doubleclick does not work), but login itself send & receive and show index of mails works.

This happens only with IMAP. 
With POP3 witz/without TLS all working.

Any idea?
Any additionl info needed?

Lg
Georg

-----Ursprüngliche Nachricht-----
Von: Timo Sirainen [mailto:tss at iki.fi] 
Gesendet: Mittwoch, 01. April 2009 23:19
An: Georg Käfer
Cc: dovecot at dovecot.org
Betreff: Re: [Dovecot] outlook problem if TLS mailsettings are off

On Mon, 2009-03-30 at 10:37 +0200, Georg Käfer wrote:
> disable_plaintext_auth = no    # outlook 2007 with TLS/SSL OFF can show index of mails, but (double)-/klick on mail gives me "sandwatch"-mouspointer and I've to restart outlook again (and enable TLS again to get it work again)

Sounds like you have some kind of a firewall or antivirus that is
capturing the IMAP traffic and breaking it. Try disabling all of them to
see if it works then.