Exchange 2003 Outbound Mail issue

I hope someone can help.

We have a 2003 SBS server running exchange. For some reason the server has stopped sending mail (happened around 3 weeks ago.) WE are getting the error that "The remote server did not respond to the connection attempt" We have rebooted the server, re-service packed the server. Deleted and recreated the SMTP connector and attempted to send without a connector. Every time we get the same error. Any help is greatly appreciated.
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Alan HardistyConnect With a Mentor Co-OwnerCommented:
Please re-install Exchange 2003 Service Pack 2 and then see if your mailflow is improved.

Also check your SMTP Virtual Server on the Delivery Tab> Outbound Connection button to make sure you are using TCP Port 25.
Jon BrelieSystem ArchitectCommented:
Please post any errors in the event log pertaining to this.
HBPROCKAuthor Commented:
Source: MSExchangeTransport
Category: Queuing Engine
Time spent on preparing to reset routes: [0] milliseconds Time spent on recalculating next hops: [0] milliseconds Queue length : [8]

and a few like

SMTP GetNextHop returned hr=0x0 in 0ms.
 DestAddr=<>, Type=<SMTP>
 MsgType=0x3, NextHopType=OTHER_ROUTING_GROUP
 Type=<SMTP>, Class=<*>, SchedId=0x0

There are also some blackbetter errors but they are to do with the users phones need resetting
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Jon BrelieSystem ArchitectCommented:
Forgive me if this sounds silly, but can your Exchange server access the internet?

Also, from the exchange server open a command prompt and type:

telnet 25  

Does that connect?
HBPROCKAuthor Commented:
yes I did try that already i probably should of put that on the original post. We can telnet to our smarthost and send mail fine but the exchange will not connect. (I am connected from another office via rdp to the server) It does seem very strange like something is stopping it from connecting but no firewall is enabled on the server and the router is allowing connections as we can telnet out.
Jon BrelieSystem ArchitectCommented:
Did anything change around the time it stopped working?  IP space, or DNS servers?

From the exchange box, if you do a

nslookup -q=mx

Does it return valid MX hosts for
HBPROCKAuthor Commented:
4 records

seems to be working fine as its the same as the ones we get in our office.
Jon BrelieSystem ArchitectCommented:
Can you post the full event log errors?  (use the copy button) and paste them in their entirety.

HBPROCKAuthor Commented:
We have finally found out the reason for this we found that someone had changed the outbound mail port we have changed this back and everything is now working.
Alan HardistyCo-OwnerCommented:
So my comment http:#a34964213 about the Port on the SMTP Virtual Server> Delivery Tab> Outbound Connection button didn't solve the problem for you?

Objecting to closure - I provided the answer.

South ModModeratorCommented:
Following an 'Objection' by alanhardisty (at to the intended closure of this question, it has been reviewed by at least one Moderator and is being closed as recommended by the Expert.
At this point I am going to re-start the auto-close procedure.
Thank you,
Community Support Moderator
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