[colug-432] Android and IMAP weirdness

[Brian Miller]

On 02/22/2014 11:48 PM, Stephen Potter wrote:
> I've got a strange problem that recently cropped up, hope someone has a
> good idea.
>
> I have my Android phone getting mail from my home server through IMAP.
> This has worked correctly for several years.  I recently replaced my
> router and now I can't get my INBOX on my phone.  I can get other mail
> folders without issue, but my INBOX never refreshes properly.  I believe
> the only port I had open on my old router was 143 (I've also got 25 and
> 110 open, just to be sure).
>
> On the mail server (Linux), I get an error whenever IMAP tries to
> connect:  Connection closed: Connection reset by peer bytes=580/47779
>

This would imply to me that either the router or the phone is closing 
the connection from the Linux server to the phone.  If the imap client 
on the phone hasn't been upgraded recently, maybe the pass-through 
firewall rule isn't letting packets back out.