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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 &quot;550 5.7.1 Unable to relay&quot; error. We are using exchange 2010 on the SBS 2011 server. Any thoughts on how to allow emails to flow inbound properly?
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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?

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

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

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

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