I have simple
server Windows 2008 Standart SP2 with Exchange 2007 with apply SP1. Only one DC and one Exchange
server (not exist Edge) in the same
server.
I have first distribution
group by name "
[email protected]" with 10 users. Working with internal and external mail correctly.
I have second distribution
group by name "
[email protected]" with 3 users. Working with internal mail correctly, but external mail delivery failed 2 from 3 users. Only 1 users proclaims that external mail delivered correctly. Those 3 users they are too member of distribution
group [email protected]" .
I am not found in the eventlog any problem with Exchange
server. Any
user and any distribution
group not check the box "Require that all senders are authenticated."
Any ideas on how to solve the problem?