Bounce 550 5.7.1 RESOLVER.RST.AuthRequired; authentication required (Exchange 2007)

From ben.goodacre.name/tech

Jump to: navigation, search

Symptom

When sending an email to a distribution list on Exchange 2007 from an external sender the following bounce is received, or viewable in the SMTP/Hub Transport log:

550 5.7.1 RESOLVER.RST.AuthRequired; authentication required

Cause

By default Exchange 2007 requires that a sender be authenticated before being able to successfully send to a distribution list. Consequently external users are unable to send emails to it.

Resolution

Personal tools
Namespaces
Variants
Actions
Navigation
Toolbox