"550 5.7.1 Unable to relay" displayed on inbound emails after migrating from SBS '03 to SBS '11

We just migrated from SBS 2003 to SBS 2011 using the SBS 2011 migration tool. We are now receiving reports that, after migrating, that some inbound emails are reporting a "550 5.7.1 Unable to relay" error. We are using exchange 2010 on the SBS 2011 server. Any thoughts on how to allow emails to flow inbound properly?
dgavetteAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Maen Abu-TabanjehNetwork Administrator, Network ConsultantCommented:
read this ..

http://blogs.technet.com/b/exchange/archive/2006/12/28/3397620.aspx

One thing to keep in mind, is you would need 2 IP Address.  This is unless you specify a remote server IP Address on the relay connector.  When the Hub Transport receives a relay attempt from a server, if it notices there is a connector with an explicitly defined ip address instead of 0.0.0.0-255.255.255.255, it will use that connector which has the relay enabled negating the need for a second IP Address for relaying.

Make sure you follow all those steps including doing the Add-ADPermission for the connector to allow the anonymous logon group to relay using that connector.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.