Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Exchange 2010 SMTP timeout

Posted on 2013-11-21
2
Medium Priority
?
1,984 Views
Last Modified: 2013-11-22
Hi, I am getting a long SMTP transaction time (45 seconds) connecting to our Exchange 2010 server from the internet. Our voice mail server (not on our network) times out trying to email to our Exchange 2010 server.  The funny thing is that most senders do not have problems sending to us, and when I send mail from my gmail account, it is received in about 10 seconds.

I have disabled tarpitting (which was only 5 seconds) and disabled all message filtering.  This did not change the SMTP transaction time.

I have two receive connectors:
DEFAULT RELAY, Network config to receive email from remote servers on our local subnets (exchange 2010 would not let me leave this blank).  Available security: TLS, basic auth, exchange server auth, and integrated windows auth. Permission groups, anonymous users.
OUTSIDE RELAY, network config to receive from 0.0.0.0/0, same auth minus exchange server, Permission groups, anonymous users.

When I telnet in, after the 45 second delay, I get the default relay connector instead of the outside relay.

The path received mail takes from the internet is 1) Windows 2008 R2 firewall/vpn server, deep six spam box, and then the exchange server.  The voice mail server is on the same subnet as the internet facing address of the firewall server.

Any suggestions on fixing this?  Thanks in advance for your help.
0
Comment
Question by:Stolzman
2 Comments
 
LVL 14

Accepted Solution

by:
Radweld earned 2000 total points
ID: 39668489
I would be looking at your deep six spam box for answers. You could configure your firewall forwarder to target the Exchange 2010 Hub transport directly in order to test this. if all of a sudden your connection times speed up you know there is an issue with that appliance. I would also consider reconfiguring your relays,

http://exchangeserverpro.com/how-to-configure-a-relay-connector-for-exchange-server-2010/
0
 
LVL 1

Author Closing Comment

by:Stolzman
ID: 39670386
Yup, that was it, the spam box was causing the delay.  I've got a help ticket in with the mfg.  Thanks.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The core idea of this article is to make you acquainted with the best way in which you can export Exchange mailbox to PST format.
Steps to fix error: “Couldn’t mount the database that you specified. Specified database: HU-DB; Error code: An Active Manager operation fail”
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles to another domain controller. Log onto the new domain controller with a user account t…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Suggested Courses

886 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