Avatar of Castlewood
Castlewood
 asked on

550 5.7.1 RESOLVER.RST.AuthRequired; authentication required

The web server in DMZ is not able to send mail to a distribution group in our Exchange 2010. I'm sure the receive connector has been set to allow delivery of internal emails from anonymous users with this command:

Get-ReceiveConnector "RelayWeb” | Add-ADPermission -User "NT AUTHORITY\ANONYMOUS LOGON" -ExtendedRights "Ms-Exch-SMTP-Accept-Authoritative-Domain-Sender"
 
and from the log tracking I can see the email did get through the connector but then failed in routing to this distribution group. The error is:
550 5.7.1 RESOLVER.RST.AuthRequired; authentication required

What could be wrong? Could a distribution group be set up to only allow authenticated users to send mail? How to resolve the issue?
Please help. Thanks.
Exchange

Avatar of undefined
Last Comment
M A

8/22/2022 - Mon
jmac44

Double check you receive connector in the Exchange management console and make sure it's not set up for authentication see below:
Receive Connector
Castlewood

ASKER
But it should be some other issue than of the receive connector as I can see from the log that the email did get through the connector. (see attached.)
As I can see, it is more like a distribution group being set up to only allow authenticated users to send mail. But if that is the case, how to resolve it?
web.pdf
ASKER CERTIFIED SOLUTION
Castlewood

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
M A

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Accept: Castlewood (https:#a42052048)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

abbasiftt
Experts-Exchange Cleanup Volunteer
Experts Exchange is like having an extremely knowledgeable team sitting and waiting for your call. Couldn't do my job half as well as I do without it!
James Murphy