Diagnostic code: smtp;501 DNS says just_hostname is not a real domain

Question

Hi guys,
I'm running IMS5.2 in Solaris and i have a problem sending a mail to a specific domain. I can send mail to everybody but not to this one. I think the problem is in the other side, but i need to confirm this suspect and understand the error i'm getting. This is the report i receive when i try to send an e-mail to this specific domain( They are probably using MDaemon 6.8.5):
This report relates to a message you sent with the following header fields:
Return-path: <user@mydomain>
Received: from tcp-daemon.mail.mydomain by mail.mydomain
(iPlanet Messaging Server 5.2 (built Feb 21 2002))
id <[email protected]> (original mail from user@mydomain); Mon,
19 Jan 2004 08:31:33 +0200 (GMT)
Received: from mydomain (myhost [192.168.1.33])
by mail.mydomain (iPlanet Messaging Server 5.2 (built Feb 21 2002))
with ESMTP id <[email protected]> for final_user@domain_to_deliver; Mon,
19 Jan 2004 08:30:04 +0200 (GMT)
Received: from [196.28.224.7] by mail.mydomain(mshttpd); Mon,
19 Jan 2004 08:30:04 +0200
Date: Mon, 19 Jan 2004 08:30:04 +0200
From: user@mydomain
Subject: Teste da conta de e-mail
To: final_user@domain_to_deliver
Message-id: <c854a4.54a4c8@mydomain>
MIME-version: 1.0
X-Mailer: iPlanet Messenger Express 5.2 (built Feb 21 2002)
Content-type: text/plain; charset=windows-1252
Content-language: en
Content-transfer-encoding: quoted-printable
Content-disposition: inline
X-Accept-Language: en
Priority: normal
Your message cannot be delivered to the following recipients:
Recipient address: final_user@domain_to_deliver
Reason: Remote server rejected HELO command.
Diagnostic code: smtp;501 DNS says <just_my_hostname> is not a real domain
Remote system: dns;mail.domain_to_deliver (domain_to_deliver ESMTP MDaemon 6.8.5; Mon, 19 Jan 2004 08:44:34 +0200)
Any comments please!
Best Regards

Answer 1

In your imta.cnf file, look down to the second part, marked,
"Part II, Channel Block"
Look further down, find
! tcp_local
tcp_local smtp mx single_sys remotehost inner\ switchchannel identnonelimited subdirs 20 maxjobs 20\
pool SMTP_POOL maytlsserver maysaslserv\ dequeue_removeroute\
tcp-daemon somedomain.com
The 4 lines after "!tcp_local" are all on one line. I've added the backslash character to show a continuation. The next line contains the tcp-daemon keyword, and is followed by what the server will send out on the ehlo/helo line.