[TriLUG] Email issues

[S B]

Hi

The final bounce message simply said

-------------------------------------
Sorry, I wasn't able to establish an SMTP connection. (#4.4.1)
I'm not going to try again; this message has been in the queue too long.
-------------------------------------



Looking at the qmail log (dedicated server->shared), I see this exactly 1 
min after my desktop client initially delivered the email to the server
-------------------------------------

Jan 24 20:58:38 plesk qmail: 1169693918.556982 delivery 1286: deferral: 
Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/

Jan 24 20:58:38 plesk qmail: 1169693918.557110 status: local 0/10 remote 
0/20

-------------------------------------


I forgot to mention earlier that I was also trying to establish a HTTP 
connection between the 2 hosts (using PHP cURL), and that too timed-out, so 
I think it's more general than just SMTP connections but only applies to 
certain (few) combinations of hosts.


Simon...

----- Original Message ----- 
From: <OlsonE at aosa.army.mil>
To: <trilug at trilug.org>
Sent: Friday, February 02, 2007 1:46 PM
Subject: RE: [TriLUG] Email issues


What was the text of the message bounce? That would help quite a bit.

-----Original Message-----
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
Behalf Of S B
Sent: Friday, February 02, 2007 1:24 PM
To: trilug at trilug.org
Subject: [TriLUG] Email issues

Hi All,

I know this may not strictly speaking be a Linux question so I beg
forgiveness in advance, but I'm hopeful someone will be able to point me
in the right direction.

I'm having trouble sending email between 2 accounts I look after.

One is a domain on a dedicated server (Redhat+Plesk (qmail) ), the other
is a shared/managed hosting account (cPanel) at a completely different
provider.

Wehn I tried sending email in either direction between these 2
particular accounts, the email stalled for 4 days then bounces. Both
accounts had no trouble sending/receiving with most (all?) other MTAs

I noticed SMTP on the dedicated server was very slow (20-30 sec delay)
to accept email from my desktop client so I turned off the reverse-DNS
lookup it was doing. This helped the speed at which I can send email out
through it, but didn't improve the 'connection' to the shared/managed
account.

After a long investigation and no resolution found, the shared hosting
provider moved my managed account to another of their servers, and I was
then able to send/receive email with the dedicated server.
However the client on the dedicated server reports they have the same
issue with a few other (important) contacts.
Unfortunately moving my managed account also removed my test-bed to
track down the root cause (but I needed my email fixs!!)

Has anyone seen similar issues and/or have suggestions as to what the
underlying problem may be?

Simon...

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