• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 2518
  • Last Modified:

5.1.0 - Unknown address error 550-'Unrouteable address' even though recipient policies setup

Hi I wonder if any of you can help.
My customer has 3 differents domains and thus emails which he wants to recieve on the new SBS 2003 server.
SBS is setup correctly and recieving ok email addresses to john.com
I have setup via the hosting company for the MX records for domains peter.com and paul.com to point to the servers ip and opened the ports in the Routers firewall.
Recipient policies in Exchange are set to a primary smtp entry for john.com
added additional smtp records to peter.com and paul.com

But still no emails and I get the following email bounced back

The following message to <richard@peter.com> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'Unrouteable address'

All help gratefully recieved and thanks in advance.
PS New to exchange so probably something easy.
  • 3
1 Solution

In your recipient policy, you need to set for each domain "This Exchange Organisation is reponsible for all mail delivery to this address".

rjandrews2008Author Commented:
Thanks, can you advise how I go about doing this?? Have checked the properties of the default policy (its this one I added the additional domains too) but can't see anything.
rjandrews2008Author Commented:
Hi, found it. Deleted and re-added the domain names and made sure the "This Exchange Organisation is reponsible for all mail delivery to this address" was ticked for each. (it appears when you add the smtp address in for people who don't know)

Will do some tests and get back.
rjandrews2008Author Commented:
Looks like that works, wierd almost like something didn't stick. Re did the policy and seems ok now.
Thanks very much for all your help.

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now