Re: [Dovecot] Problems with Outlook clients after a migration

...

but also some May 26 12:19:22 s000085 dovecot: IMAP(lgsavbaf): Disconnected in IDLE bytes=161/2018

Something disconnected the client. Maybe you've a firewall/load-balancer/etc in the middle that doesn't like long idling connections? Although that wouldn't explain why it worked with v1.1.

The network setup is different for this server:NIC bonding, a different VLAN, ... I'll do some network checks.

You could also try it yourself:

telnet imap.server.com 143 a login user pass b idle

and see if it gets disconnected. It should also send "* OK Still here" every 2 minutes, so I'd guess nothing should disconnect it..

I'm checking it now.

Thanks!

Joseba Torre. Vicegerencia de TICs, área de Explotación