Solved

Exchange 2010 SMTP timeout

Posted on 2013-11-21
2
1,536 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 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

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
Following basic email etiquette rules will help you write a professional email and achieve a good, lasting impression with your contacts.
This tutorial will show how to configure a new Backup Exec 2012 server and move an existing database to that server with the use of the BEUtility. Install Backup Exec 2012 on the new server and apply all of the latest hotfixes and service packs. The…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …

822 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