Exchange 2010 Transaction

squrany
squrany used Ask the Experts™
on
451=the server has reached its limit for processing requests from your host


OK - Reverse DNS matches SMTP Banner
Warning - Does not support TLS.
0 seconds - Goodon Connection time
OK - Not an open relay.
12.074 seconds - Not good! on Transaction Time
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Benjamin MOREAUProject Manager

Commented:
When have you this message ? When you try to send a mail to external users ?

Author

Commented:
yes
Benjamin MOREAUProject Manager

Commented:
OK, could you post the SMTP log corresponding to this error ?

Maybe you haven't configure an external domain on the account which one you try to send mail...
Project Manager
Commented:
or maybe someone is sending a lot of spam from your network...
Check your firewall config to allow only your mail server to send mail with port TCP25.

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial