Monday, February 10, 2014

550 5.7.1 RESOLVER.RST.AuthRequired; authentication required



Error:
 
Getting error when sending email to Distribution List
5.7.1 smtp;550 5.7.1 RESOLVER.RST.AuthRequired; authentication required> #SMTP#

When creating a new recipient or distribution group in the Exchange management console for Exchange, by default it will require that all senders are authenticated.

Solution:
1.      Go to the Recipient Configuration
2.      Select Distribution Group
3.      Right Click on the Distribution Group then click on the Mail Flow Settings tab and   
        double-click the Message Delivery Restrictions option.
4.      Un check    “require that all senders are authenticated

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