problems with pop3 daemons

Clifton Royston cliftonr at tikitechnologies.com
Wed May 11 12:00:03 PDT 2005


On Wed, May 11, 2005 at 04:58:40PM +0200, Gal Ben-Haim wrote:
> Im running a mailserver on FreeBSD 5.4, for some time now im 
> experiencing problems with downloading large messages (above 1 mb but i 
> don't know from which size it starts) through pop3:
> After about 30 secs of downloading, the download just hangs,
> qpopper's output to the logs is: ay 11 16:31:00 loki qpopper[57578]: I/O 
> error flushing output to client xxx Operation not permitted (1).
> 
> I tried to switch pop3 daemon, and tried popd, pop3lite and pop3ad.. all 
> did the same thing but didn't report anything..
 
  This is one for the qpopper mailing list, but to save you some
trouble, the "not pemitted" is what qpopper reports when the client end
of the connection has gone away and it finds it's writing to a closed
socket.  It gets seen on all kinds of platforms and is not a BSD issue,
nor (usually) an OS configuration issue.

  This almost always indicates a buggy POP client which is failing on
some message, and/or a client which is running AV software which
transparently "hijacks" POP connections in order to scan them.  In
either case you need to see what's going on on the client end.  qpopper
is merely more verbose about reporting this than most POP servers.

  -- Clifton

-- 
          Clifton Royston  --  cliftonr at tikitechnologies.com 
         Tiki Technologies Lead Programmer/Software Architect
"I'm gonna tell my son to grow up pretty as the grass is green
And whip-smart as the English Channel's wide..."
                                            -- 'Whip-Smart', Liz Phair


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