[GRLUG] Thunderbird on Win7

[Adam Tauno Williams]

On Sun, 2011-03-06 at 18:07 -0500, Eric Beversluis wrote: 
> > > I checked with Omnis. They said:
> > > --"all timeouts relate to connectivity on the users end to us"
> > > --Outbound server is mail.omnis.com port 587
> > > --inbound server is mail.omnis.com with port 110 
> > > I've turned off both AVG antivirus and the Windows firewall.
> > > Still getting the connection timeout.
> > > ????
> > Can you telnet to the target address & port?
> It's not clear to me what that would establish. Wouldn't a mail server
> not be open to telnet? 

There is no such thing as "telnet";  they are open to TCP stream
connections or not.  SMTP, Telnet, POP, IMAP, etc... are all TCP stream
protocols.  You can telnet to the SMTP port and do mail transactions
manually ... provided *you* can speak SMTP [or POP, IMAP, etc...].  It
is very useful for testing.

> "eric at eric-lenovo:~$ telnet mail.omnis.com
> Trying 216.239.128.27...
> telnet: Unable to connect to remote host: Connection timed out

No, you need to telnet to the SMTP delivery port.

telnet mail.omnis.com:587

You should *not* see "Unable to connect to report host";  if you do see
that - then they aren't listening there.

> eric at eric-lenovo:~$ sudo ping 216.239.128.27
> PING 216.239.128.27 (216.239.128.27) 56(84) bytes of data.
> ^C
> --- 216.239.128.27 ping statistics ---
> 23 packets transmitted, 0 received, 100% packet loss, time 22175ms

Ping doesn't really tell you much since most DMZs will drop ICMP
traffic.

> eric at eric-lenovo:~$ telnet mail.omnis.com:587
> telnet: could not resolve mail.omnis.com:587/telnet: Name or service not
> known"

Try "telnet mail.omnis.com 587" [space, not colon].  I forget which way
it works on Windows.

> >From Win7/Putty:
> "220 relay.omnis.com ESMTP Postfix - (mail-hub-d.omnis.com)

Yep.

awilliam at linux-yu4c:~> telnet mail.omnis.com 587
Trying 216.239.128.27...
Connected to mail.omnis.com.
Escape character is '^]'.
220 relay.omnis.com ESMTP Postfix - (mail-hub-d.omnis.com)

So mail.omnis.com TCP/587 *is* an SMTP service.  And you can reach it,
from the Windows 7 box (assuming that is where you are putty'ing from).


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