SMTP stopped receiving

SMTP stopped receiving

Post by W. Haunzwi » Thu, 02 Sep 2004 07:46:42

a customer has a W2k SP4 Small Business Server including
Exchange SP3. This morning the SMTP service stopped
receiving all of a sudden for no obvious reason. When I
log in via Terminal Server I can "telnet server 25" from
my system and get a reply. But when I run the same command
locally on the server I get "no connection".

SMTP still sends out and internal mail also works fine.

We've checked all services and the events, nothing
unusual. We stopped and started Exchange and rebooted the
server, no joy.

Any ideas anybody?


SMTP stopped receiving

Post by trmb » Sat, 04 Sep 2004 11:14:24

Hi Wolf,
What events appear in your application event log related to the SMTP and MTA
I encountered a similar problem which occurred as someone uninstalled and
reinstalled the IIS SMTP service which replaced the Exchange SMTP version.
You can check the SMTP version by telnetting to the your exchange server on
port 25, eg. "telnet EXCHSRVR 25" - this will result in the Exchange server
standard welcome screen, eg.
220 <servername> Microsoft ESMTP Mail Service, Version: 6.0.3790.0 ready at
Fri, 3 Sep 2004 12:10:06 +100
Then type EHLO and check the response received from the Exchange server -
check within the list of ESMPT commands supported for the X-LINK2STATE and
the XECH50 commands. If thery dont appear then you have the standard version
of SMTP and not the Exchange version. To reinstate the Exchange version,
reinstall Exchange from the CD with the "reinstall" option.
Good luck



SMTP stopped receiving

Post by anonymou » Mon, 06 Sep 2004 06:36:04

Problem wa McAfee 8 Enterprise that comes with a "security
feature" that blocks port 25!

SMTP stopped receiving

Post by trmb » Wed, 08 Sep 2004 11:15:14

Again, where was McAfeee menioned in this posting?