Solved

Exchange server 2003 lost connectivity on port 25

Posted on 2006-07-19
9
225 Views
Last Modified: 2010-03-06
Suddenly around noon today my Exchange Server stopped delivering incoming messages.  All internal emails work fine.

I am not getting a response from my exchange server when I try to telnet to port 25.

All services are running on exchange.

The information store is mounted.

The firewall is not in question when I try to telnet from the same subnet.

Help!!
0
Comment
Question by:LamkaB
9 Comments
 
LVL 27

Expert Comment

by:Exchange_Admin
ID: 17143004
Is your SMTP service running on the Exchange server?
0
 

Author Comment

by:LamkaB
ID: 17143058
Yes, the SMTP service is running along with all the exchange services.
0
 
LVL 27

Expert Comment

by:Exchange_Admin
ID: 17143375
Are you sure that there is not a firewall running on the server?
0
 

Author Comment

by:LamkaB
ID: 17143384
Double checked.  Firewall service is not loaded.

Brenda
0
Why are Office 365 signatures so complicated?

Trying to setup transport rules for Office 365 email signatures and can’t quite figure it out? Having to test the signature over and over? Make things simple by using Exclaimer Cloud - Signatures for Office 365.

 

Author Comment

by:LamkaB
ID: 17143412
when running netstat -na on the exchange server the following entries exist:

Proto               Local Address               Foreign Address             State
TCP                 0.0.0.0:25                      0.0.0.0                        LISTENING
TCP                 192.168.1.248:25            192.168.1.1:52825       TIME_WAIT
TCP                 192.168.1.248:25            192.168.1.1:52833       TIME_WAIT
TCP                 192.168.1.248:25            192.168.1.1:52869       TIME_WAIT
TCP                 192.168.1.248:25            192.168.1.1:52874       TIME_WAIT

There are other entries for port 25 all showing TIME_WAIT
as well as other ports.

Brenda
0
 

Author Comment

by:LamkaB
ID: 17143744
Found the problem.  

I added an ip of 2 servers to the list of machines under connection control. One of which was the Firewall and the source of the incomming mail.

However, Exchange apparently did not like it!
0
 
LVL 104

Expert Comment

by:Sembee
ID: 17149563
If you restricted the SMTP connection then I would expect traffic to stop.
Email that is coming from outside is not coming from the firewall - it simply passes through the firewall. Unless your email is coming in from an external machine (for example an antispam provider) then you cannot restrict access to SMTP if you want email to come in correctly.

Simon.
0
 

Accepted Solution

by:
CetusMOD earned 0 total points
ID: 17350833
PAQed with points refunded (500)

CetusMOD
Community Support Moderator
0

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

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

We are happy to announce a brand new addition to our line of acclaimed email signature management products – CodeTwo Email Signatures for Office 365.
Find out what you should include to make the best professional email signature for your organization.
To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Rules tab.:  To cr…
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…

863 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now