[Dovecot] very frequent disconnections

[Timo Sirainen]

On Fri, 2009-10-09 at 16:09 -0400, Dan Christensen wrote:
> The very frequent dropped connections don't happen if I don't use TLS.
> To summarize:
> 
> - they happen with TLS to port 143
> - they don't happen with a plain connection to port 143
> - they don't happen with a TLS connection to port 11143

This clearly indicates some firewall/antivirus/IDS in the middle
believing that port 143 only has plaintext traffic and then get entirely
confused when they see TLS traffic and at some point decide to kill the
connection. I guess using imaps on port 993 would also fix it?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part
Url : http://dovecot.org/pipermail/dovecot/attachments/20091009/94da933d/attachment.bin