Solved

Exchange 2010 SMTP timeout

Posted on 2013-11-21
2
1,741 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 14

Accepted Solution

by:
Radweld earned 500 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

Prepare for your VMware VCP6-DCV exam.

Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.

Question has a verified solution.

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

Unified and professional email signatures help maintain a consistent company brand image to the outside world. This article shows how to create an email signature in Exchange Server 2010 using a transport rule and how to overcome native limitations …
For anyone that has accidentally used newSID with Server 2008 R2 (like I did) and hasn't been able to get the server running again because you were unlucky (as I was) and had no backups - I was able to get things working by doing a Registry Hive rec…
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…
In this Experts Exchange video Micro Tutorial, I'm going to show how small business owners who use Google Apps can save money by setting up what is called a catch-all email address in their Gmail accounts. By using the catch-all feature, small busin…
Suggested Courses

627 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