On Tue, 2010-09-14 at 06:58 -0430, Patrick O'Callaghan wrote:
> On Tue, 2010-09-14 at 21:55 +1200, Victoria Spagnolo wrote:
> > In the past year I've taken my laptop to meetings in other cities
> > where
> > wireless was available and had trouble with sending/receiving mail.
> > rall, I'd connect, visit some sites, send/receive mail, then
> > disconnect. Sometime later I'd connect, visit some sites but couldn't
> > send or receive mail. And maybe one time I could receive but not send.
> > know that isn't much detail. I am just asking for advice on what I can
> > try or how to investigate this behaviour next time this happens.
> Please explain what you mean by "couldn't send or receive". You mean
> there's no connectivity (did you try pinging the respective servers?),
PING may not tell you anything; ICMP might be blocked while TCP is not,
or vice versa.
telnet {your-smtp-server} 587
- and see if you get a connected message.
> or there was a password failure, or Evo connected but didn't
> download/upload anything, or what?
Evo's error reporting is pretty 'lite', IMO.
> You also need to consider policy in force on the net you're connected
> to. Some admins, especially in corporate networks, won't allow
> connections to random external servers.
+1 That includes me. Blocking egress TCP/143 & TCP/993 (IMAP) and
TCP/25 & TCP/587 (SMTP) is common and advisable.
--
Adam Tauno Williams <[email protected]> LPIC-1, Novell CLA
<http://www.whitemiceconsulting.com>
OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba
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