We help IT Professionals succeed at work.
Get Started

Exchange 2010 limit for incoming messages with many recipients ?

Martin_Radbo
Martin_Radbo asked
on
98 Views
Last Modified: 2016-11-08
Out customer have their own Exchange server 2010 in their office. Incoming mail are first sent to an external server for spam filtering.
That server is a Linux machine running postfix.
After spam checks and similar is done, the email are sent to the exchange server which has a receive connector configured to accept incoming emails only from the external server.

This works fine, but there are one problem. Often when email are sent to the customer with more than one recipients, for example one TO-address and one CC-address, the exchange server refuse one of two recipients.
Later on, when the postfix server retries the refused address, it works. But the customer complains about delayed mails...

Log file from postfix:
I Aug 29 08:22:59 vmi65459 postfix/smtp[5190]: B398DD80AFB: to=<prename.surename@domain.com>, relay=none, delay=532, delays=531/0.03/0/0, dsn=4.4.1, status=deferred (connect to mail.domain.com [XXX.XXX.XXX.XXX]:25: Connection refused)

Is there a limit for number of concurrent connections for incoming mail which I can increase at the Exchange server?
Comment
Watch Question
This problem has been solved!
Unlock 2 Answers and 2 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE