ATT.NET's MX addresses are 12.102.240.23 and the one you tried to reach,
204.127.134.23.
Dnsstuff.com says both are fine.
When I telnet from my mail sevrer, they come up OK.
When I telnet from my workstation, they both report the 450 error.
I have PTR records on all IPs, so I am guessing they are doing some kind of
lookup to see whether the IP that is connecting has an MX record attached to
it.
If you are gatewaying your inbound mail, then the MX record would not point
to your mail server. I would suggest telnetting from your gateway if you
have one to see if that is the answer.
-Dave
----- Original Message -----
From: "imail" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, February 28, 2006 11:45 AM
Subject: [IMail Forum] 450 busy, when delivering to att.net
Starting about a week ago, all outgoing messages sent from our Imail
server to any @att.net account have been failing delivery. Every time our
SMTP server tries to connect to att.net or worldnet.att.net, we get the
following error:
450 busy - please try later
This ONLY happens when attempting to send to AT&T's mail server. We are
delivering mail to other servers fine. We are receiving mail from
@att.net email accounts fine. But we can reproduce this problem when
sending from any of the domains on our mail server to any @att.net email
account.
We contacted att.net's mail administrators and were told that the problem
must be on our end and that they would not help us. I'm stumped.
I've included one complete example from our server logs below. Thanks in
advance for any ideas or advice you can give me.
Keith W. Schoenly
Addison Technologies, Inc.
-------------------------------------------------------
02:27 16:52 SMTPD(00EF01BC) [151.197.165.4] connect 151.197.165.10 port
4980
02:27 16:52 SMTPD(00EF01BC) [151.197.165.10] HELO kschoenl
02:27 16:52 SMTPD(00EF01BC) [151.197.165.10] MAIL FROM:
<[EMAIL PROTECTED]>
02:27 16:52 SMTPD(00EF01BC) [151.197.165.10] RCPT TO: <[EMAIL PROTECTED]>
02:27 16:52 SMTPD(00EF01BC) [151.197.165.10]
D:\IMail\spool\D748500ef01bce269.SMD 618
02:27 16:52 SMTP-(041078BE) processing
D:\IMail\spool\Q748500ef01bce269.SMD
02:27 16:52 SMTP-(041078BE) [x] looking up att.net in HOSTS and MX
02:27 16:52 SMTP-(041078BE) Info - Found att.net in DNS Cache
02:27 16:52 SMTP-(041078BE) Trying att.net (0)
02:27 16:52 SMTP-(041078BE) [x] Connecting socket to service <SMTP> on
host <att.net> using protocol <tcp>
02:27 16:52 SMTP-(041078BE) Info - Found att.net in DNS Cache
02:27 16:52 SMTP-(041078BE) Connect att.net [204.127.134.23:25] (1)
02:27 16:52 SMTP-(041078BE) 450 busy - please try later
02:27 16:52 SMTP-(041078BE) SMTP_DELIV_FAILED
02:27 16:52 SMTP-(041078BE) >QUIT
02:27 16:52 SMTP-(041078BE) [E] didn't send "QUIT": connection
aborted02:27 16:52 SMTP-(041078BE) rl-recv: connection aborted
02:27 16:52 SMTP-(041078BE)
02:27 16:52 SMTP-(041078BE) [u] closing socket (u)
02:27 16:52 SMTP-(041078BE) requeuing D:\IMail\spool\Q748500ef01bce269.SMD
R0 T1
02:27 16:52 SMTP-(041078BE) finished D:\IMail\spool\Q748500ef01bce269.SMD
status=3
------------------------------------------------------
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