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smtp 550 unrouteable mail domain

I got the error message stated in the subject line for our domain for one of our outgoing message. I have never seen such a complaint before, and all other outgoing messages just work fine. What do you think I got that complaint from one our email destinations?Thanks,

[282 byte] By [rami] at [2007-11-26 11:13:25]

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# 1

Please post the entire text of the message you get. From your description, I can't tell what is happening.

jay_plesset at 2007-7-7 3:28:01 >

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# 2

Here is the full report from postmaster:

This report relates to a message you sent with the following header fields:

Message-id: <007e01c6feb3$9831f610$530aa8c0@NICKIHP>

Date: Thu, 02 Nov 2006 11:17:51 -0800

From: Person <useername@mydomain.com>

To: recipient@remotedomain.com

Subject: FW: Subject Line

Your message cannot be delivered to the following recipients:

Recipient address: recipient@remotedomain.com

Reason: Remote SMTP server has rejected address

Diagnostic code: smtp;550-Verification failed for <useername@mydomain.com> unrouteable mail domain "mydomain.com" Sender verify failed

Remote system: dns;remotedomain.com (TCP|10.0.0.14|63998|70.86.4.20|25) (miranda.cyberservers.net ESMTP Exim 4.52 #1 Thu, 02 Nov 2006 13:18:08 -0600 )

rami at 2007-7-7 3:28:01 >

# 3

Ok, what it means:

The server you're attempting to send to is checking your domain for a proper DNS entry, and isn't finding it.

This could be because:

1. your server is not giving the correct/matching address for your user and itself.

2. You don't have valid DNS entries for "mydomain.com"

3. The server on the other side is misconfigured.

jay_plesset at 2007-7-7 3:28:01 >

# 4

Hi,

1) How can I make sure that my server is giving the correct/matching address for my user and itself?

2) I have valid DNS and reverse DNS entries for mydomain.com. However, I wonder how the remote server was aware of the internal IP address of my server - 10.0.0.14. This can be seen in the postmaster report above like Remote system: dns;remotedomain.com (TCP|10.0.0.14|63998|70.86.4.20|25) ?

Thanks,

rami at 2007-7-7 3:28:01 >

# 5

Messaging Server gets the system name from the /etc/hosts file. It will pick the first instance of it's own name. Solaris insists on putting a "short name" thiere by default, so editing that file is good practice.

You can also override the default in your imta.cnf. Locate the "part II channel blocks" section, and then drop down to the tcp_local definition.

There are three lines:

!comment describing the channel

channel keywords

tcp_local_daemon

add to the third line what want your server to represent itself as:

tcp-local_daemon myserver.mydomain.com

run:

imsimta cnbuild

imsimta reload

jay_plesset at 2007-7-7 3:28:01 >

# 6

Hi,

> 2) I have valid DNS and reverse DNS entries for

> mydomain.com. However, I wonder how the remote server

> was aware of the internal IP address of my server -

> 10.0.0.14. This can be seen in the postmaster report

> above like Remote system: dns;remotedomain.com

> (TCP|10.0.0.14|63998|70.86.4.20|25) ?

Please provide the *actual* response rather then the munged version i.e "Diagnostic code: smtp;550-Verification failed for <useername@mydomain.com> unrouteable mail domain "mydomain.com" Sender verify failed"

That way we can verify outside of your network whether the real domain listed in the email address is indeed correct and externally visible.

With regards to the remote server 'seeing' your IP address, well it can't. The address listed is not route-able across the internet. The bounce message was most likely created by your server but as you didn't supply all of the headers of the message I can't tell for sure.

Regards,

Shane.

shane_hjorth at 2007-7-7 3:28:01 >

# 7

Hi,

I did the suggested modification in imta.cnf, and then tested to send to that original domain. And it failed again. Here is the postmaster report I got for that:

This report relates to a message you sent with the following header fields:

Message-id: <JCEFIADJBLOJOABBMADHKEANMCAB.me@salescentrix.com>

Date: Fri, 03 Nov 2006 12:37:47 -0800

From: ME <me@salescentrix.com>

To: somebody@davidalanb.com

Subject: Email failure

Your message cannot be delivered to the following recipients:

Recipient address: somebody@davidalanb.com

Reason: Remote SMTP server has rejected address

Diagnostic code: smtp;550-Verification failed for <me@salescentrix.com> unrouteable mail domain "salescentrix.com" Sender verify failed

Remote system: dns;davidalanb.com (TCP|10.0.0.14|35776|70.86.4.20|25) (miranda.cyberservers.net ESMTP Exim 4.52 #1 Fri, 03 Nov 2006 14:39:53 -0600 )

Then, I send another email to my yahoo address to see the details of the header fields. Here is the full headers of a message sent from me to my yahoo address:

X-Apparently-To: me_outside@yahoo.com via 68.142.198.149; Fri, 03 Nov 2006 12:57:09 -0800

X-Originating-IP:[149.99.243.125]

Return-Path:<me@salescentrix.com>

Authentication-Results:mta249.mail.re2.yahoo.com from=salescentrix.com; domainkeys=neutral (no sig)

Received:from 149.99.243.125 (EHLO mail.salescentrix.com) (149.99.243.125) by mta249.mail.re2.yahoo.com with SMTP; Fri, 03 Nov 2006 12:57:09 -0800

Received:from MACHINE ([149.99.243.122]) by lithium.salescentrix.com (Sun Java System Messaging Server 6.2-3.04 (built Jul 15 2005)) with SMTP id <0J8600HHTA4FHM10@lithium.salescentrix.com> for me_outside@yahoo.com; Fri, 03 Nov 2006 12:55:28 -0800 (PST)

Date:Fri, 03 Nov 2006 12:55:07 -0800

From:"Me" <me@salescentrix.com> View Contact Details View Contact Details

Subject:t

To:me_outside@yahoo.com

Message-id:<JCEFIADJBLOJOABBMADHGEAOMCAB.me@salescentrix.com>

MIME-version:1.0

X-MIMEOLE:Produced By Microsoft MimeOLE V6.00.2900.2962

X-Mailer:Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0)

Content-type:multipart/alternative; boundary="Boundary_(ID_aVkXilL/GbOX7zYrFvbFJg)"

Importance:Normal

X-Priority:3 (Normal)

X-MSMail-priority:Normal

Content-Length:685

rami at 2007-7-7 3:28:01 >

# 8

try sending a test message to your difficult site, by direct telnet.Capture that conversation, and see what it is that it chokes on.I don't see any problem with your dns record, so the error may be spurious, and something they've done incorrectly.

jay_plesset at 2007-7-7 3:28:01 >

# 9

I did as you suggested. I assume it failed again. Look at the last response from the remote server starting with 550:

lithium# telnet davidalanb.com 25

Trying 70.86.4.20...

Connected to davidalanb.com.

Escape character is '^]'.

220-miranda.cyberservers.net ESMTP Exim 4.52 #1 Fri, 03 Nov 2006 16:11:40 -0600

220-We do not authorize the use of this system to transport unsolicited,

220 and/or bulk e-mail.

MAIL FROM:me@salescentrix.com

250 OK

RCPT TO:remote_user@davidalanb.com

250 Accepted

DATA

354 Enter message, ending with "." on a line by itself

This is just a test message.

550 Administrative prohibition

quit

221 miranda.cyberservers.net closing connection

Connection to davidalanb.com closed by foreign host.

Any comments!

thanks,

rami at 2007-7-7 3:28:01 >

# 10

Well, at this point, we have proven:1. Your problem has nothing to do with Messaging Server.and2. You need to communicate with the person that handles the Exim server at cyberservers.net to find out why he's got you blacklisted.

jay_plesset at 2007-7-7 3:28:01 >

# 11

Thanks for great help! Although I could not send my email to them for the time being, I got a quite important thing right with my mail server configuration in imta.cnf.Thanks again!

rami at 2007-7-7 3:28:01 >

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