[imapfilter-devel] IDLE and 'connection reset by peer'

[Lefteris Chatzimparmpas]

On Thu, Jan 21, 2010 at 08:57:04PM -0600, David DeSimone wrote:
> The server probably is operating to standard, however, in today's
> internet there are often other gateways and security devices between the
> client and server, and they implement their own rules on how long
> connections can stay idle.
> 
> In particular there are many NAT gateways which will drop session state
> for any sessions that are idle for more than a few short minutes.  This
> impacts many protocols, like SSH, telnet, anything that expects the
> connection to stay active even if no data is flowing in either
> direction.  IMAP when using IDLE fits this description, as well.

Right, this seems more probable in this case.

> So, it is probably not the server's fault, but another device along the
> path, and imapfilter would do well to become more flexible in letting the
> user work around such brokenness.

Yes, the new "keepalive" option in 2.2.1 should help on that.