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Emails rejected - #5.5.0 smtp;553 spam ??

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Emails rejected - #5.5.0 smtp;553 spam ?? - 5.Jan.2007 3:13:09 PM   
pioneercomputers

 

Posts: 2
Joined: 21.May2005
From: U.K
Status: offline
Hello,

We have just inherited a server and have a problem sending emails to some corporate servers (SBS 2003)

The error message is

There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <ourdomain1.com #5.5.0 smtp;553-Message filtered. Please see the FAQs section on spam>

I've checked every spam list on the planet but cannot find the domain or the local exchange server IP address listed anywhere.

This problem started when we changed from POP3 to and SMTP feed, and changed domain hosts. I've asked the hosts to check the dns settings and they say everything is OK (over the Christmas holidays)

I think the problem may be due to the internal domain and the external domain both having the same name, ie mydomain1.com

If this is the case (and DNSstuff seems to point to that)

(mail1.mydomain1.com claims to be host mydomain1.com [but that host is at xx.xx.15.34 (may be cached), not yy.yy.215.209].
 

Any ideas on what the problem maybe caused by, and how to resolve it ?

Thank you


Thank you
Post #: 1
RE: Emails rejected - #5.5.0 smtp;553 spam ?? - 5.Jan.2007 3:30:02 PM   
uemurad

 

Posts: 8232
Joined: 7.Jan.2004
From: California, USA
Status: offline
Use Telnet to manually send a message from your SBS to an external domain that is failing.  The SMTP return codes may give you a better idea of what is happening.

_____________________________

Regards,

Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)
exchangeguy.blogspot.com
uemurad@yahoo.com

(in reply to pioneercomputers)
Post #: 2
RE: Emails rejected - #5.5.0 smtp;553 spam ?? - 7.Jan.2007 1:02:12 PM   
consultOz

 

Posts: 926
Joined: 11.Mar.2005
From: Virginia, USA
Status: offline
Here what is means

This means the server you are trying to send to is blocking mail sent from your server. You'll need to contact the recipient's administrator or send your message using a different mail server

Ask the recepeint server administrator Why your Domain is getting Blocked
they will tell you what RBL list they are using or the reason why The IP address of your domain, or the domain name is in the RBL list on their end

Good Luck
oz


_____________________________

Regards,
Oz Casey Dedeal
MVP (Exchange)
MCITP (EMA),MCITP (EA), MCITP (SA),
MCSE 2003 M+ S+, MCDST
Security+, Project+ ,Server+
http://smtp25.blogspot.com (Blog)
http://telnet25.wordpress.com (Blog)

(in reply to uemurad)
Post #: 3
RE: Emails rejected - #5.5.0 smtp;553 spam ?? - 24.Jan.2007 1:38:11 PM   
pioneercomputers

 

Posts: 2
Joined: 21.May2005
From: U.K
Status: offline
Hello,

Thank you for your replies.

I did come to the same conclusion as you but initially there seemed to be a multitude of domains, but as time went by it turned into just 4 or 5, so I put a smart host entry in to allow them to be able to function.

I've asked the users to talk the recipients and ask them to whitelist them

I think I will remove the smart host in teh next few days and see what occurs

Wish me luck !

Salim Lohiya

(in reply to consultOz)
Post #: 4

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