Hope you guys can help. The issue is I have 2 internal users in our company that cannot sent or recieve email from certain users outside of the company. I am able to send and recieve emails from these external people with no problem, but when these 2 internal users send to these external users, they get one of 2 messages. Exchange 2007, running Outlook 2007
First return message
The format of this recipient e-mail address isn’t valid. A valid address looks like this: username@contoso.com. Microsoft Exchange will not try to redeliver this message for you. Please check the recipient e-mail address and try sending the message again, or provide the following diagnostic text to your system administrator.
or else they get this message of
Technical details of permanent failure:
PERM_FAILURE: SMTP Error (state 16): 550 5.7.1 Message rejected due to content restrictions
Again I have been able to sent and receive from these external users without a problem. With our without attachments. I’ve been doing a lot of searching on the web, but wondering if anyone out there has encounter this problem also.
Thanks