Exchange 2003 Hangs on RCPT TO Command

Posted on 2009-05-08
Medium Priority
Last Modified: 2012-05-06
I have a Windows 2003 SBS Server running Exchange 2003 SP2.

It runs GFI MailEssentials for Spam, and Trend Message Security for A/V.

Recently mail from some outbound senders does not deliver to internal users. I would guess 80-90% does, but others dont.

Manually telnetting to port 25 reveals a banner and a standard SMTP session. It goes through the HELO or EHLO, MAIL FROM, but when I type RCPT TO:administrator@mydomain.com it hangs and does nothing.

I ran SMTPDIAG from the Microsoft site and same problem. It goes through the DNS lookups no problem but hangs on the RCPT TO Command.

I have turned off the GFI and Trend Services completely and see no change. Using HELO instead of EHLO doesn't seem to matter.

Thanks !
Question by:0xSaPx0

Expert Comment

ID: 24344349
see this might help:


from command prompt  run > Net stop TMWFP
Then run IISRESET command.
LVL 17

Expert Comment

ID: 24347068
This could be coz you do not have an SPF Record with the ISP..
or if the remote domain has recipient filtering enabled.

one more thing...
what connecting IP does it show near EHLO?

Accepted Solution

resorb earned 2000 total points
ID: 24349111
I was having the exact issue; and corrected it as follows.

Open Exhange System Manager.
Expand 'Global Settings'
Right click 'Message Delivery', choose 'Properties'
Click on the 'Connection Filtering' tab

If you are using block lists, DISABLE the ones which use
multihop.dsbl.org and list.dsbl.org
(you can keep Spamhaus and Spamcop enabled).

Click apply, and you are done.

You can verify it works by using the command:
 smtpdiag user@externaldomain.com user@localdomain.com /v

The delay will be gone.

-Robert ;)
[Resorb Networks, Inc.]

LVL 10

Author Comment

ID: 24359486
I just disabled the RBL's and it appears to be working great. I am just having the clients run some tests and will award points shortly if all is well.

thanks for the help !


Featured Post

Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Organisation is organized in a pattern to flow the day to day business, every application and system is interdepended on each other and when very important “Exchange Server downtime” happened.
In an Exchange Crossforest migration, the distribution groups can be a very complex operation that would cause loss of time, lots of issues and continued headaches if not solved in a timely manner. I had to do a similar project so I created a sc…
Planning to migrate your EDB file(s) to a new or an existing Outlook PST file? This video will guide you how to convert EDB file(s) to PST. Besides this, it also describes, how one can easily search any item(s) from multiple folders or mailboxes…
Watch the video to know how one can repair corrupt Exchange OST file effortlessly and convert OST emails to MS Outlook PST file format by using Kernel for OST to PST converter tool. It can convert OST to MSG, MBOX, EML to access them. It can migrate…

587 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question