I have a user with with W7/TBird/IMAP to my dovecot 2.1.17 server, the user complains whilst he is composing lengthy emails (with multiple fowrds/replies quoted in the message) he gets 'hour glass' over compose windows with some message about not being able to save drafts, he then powers off ADSL modem, which enables him to continue composing email, powers on ADSL, and sends email what if anything can I assess at server end to identify any issues? any TB tips, what to enable or disable on TB ? looking at dovecot now (past the issue) with 'doveadm who' I don't see the user listed I think the user keeps many messages open concurrently in TB tabs, could that exhaust connection limit ? I expect this to be a TB issue? but, hope for some pointers
El 30/05/14 08:28, voytek at sbt.net.au escribi?:> I have a user with with W7/TBird/IMAP to my dovecot 2.1.17 server, the > user complains whilst he is composing lengthy emails (with multiple > fowrds/replies quoted in the message) he gets 'hour glass' over compose > windows with some message about not being able to save drafts,Has he tried choosing a local folder for drafts?
Hij Voytek, if the connection becomes stale, it might well be a network-related or client-side issue. Have you ever heard of the ADSL MTU problem? If some router/firewall inbetween drops ICMP messages related to path-MTU-discovery, then the maximum transfer unit (MTU) might be wrong and larger packets might get dropped on their way which makes the TCP connection become stale. The user's TCP segments need to be small enough so that a PPPoE header (8 Bytes) can be added to the packets without exceeding the default network MTU of 1500 Bytes, so the maximum recommnded TCP segment size for ADSL users is 1492 Bytes. Read more about the maximum segment size (MSS) clamping issue here: http://lartc.org/howto/lartc.cookbook.mtu-mss.html Regards Daniel