• Twitter
  • FaceBook

Exchange Server Forums

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

Emails rejected - #5.5.0 smtp;553 spam ??

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [Microsoft Exchange 2003] >> Message Routing >> Emails rejected - #5.5.0 smtp;553 spam ?? Page: [1]
Message << Older Topic   Newer Topic >>
Emails rejected - #5.5.0 smtp;553 spam ?? - 5.Jan.2007 3:13:09 PM   


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

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   


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.



Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)

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


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 Casey Dedeal
MVP (Exchange)
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   


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

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

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [Microsoft Exchange 2003] >> Message Routing >> Emails rejected - #5.5.0 smtp;553 spam ?? Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts

Follow TechGenix on Twitter