Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Exchange 2010 SMTP timeout

Posted on 2013-11-21
2
Medium Priority
?
1,863 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 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

Get your Disaster Recovery as a Service basics

Disaster Recovery as a Service is one go-to solution that revolutionizes DR planning. Implementing DRaaS could be an efficient process, easily accessible to non-DR experts. Learn about monitoring, testing, executing failovers and failbacks to ensure a "healthy" DR environment.

Question has a verified solution.

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

This article will help to fix the below errors for MS Exchange Server 2013 I. Certificate error "name on the security certificate is invalid or does not match the name of the site" II. Out of Office not working III. Make Internal URLs and Externa…
If you troubleshoot Outlook for clients, you may want to know a bit more about the OST file before doing your next job. IMAP can cause a lot of drama if removed in the accounts without backing up.
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
Suggested Courses

721 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