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Can't send mail to a particular domain

Posted on 2007-11-24
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Last Modified: 2010-03-06
I have set up a new SBS 2003 with exchange.Could send & receive mails to all domain except a particular domain.So I created an SMTP connector which fixed the problem of sending mails to this domain but still I can't receive mails from this domain.We support both the domains,this domain uses exch 5.5.Telnet on port 25 fails for both domains.Pls let me know what else I should check.
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Question by:Musafeer79
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7 Comments
 
LVL 104

Expert Comment

by:Sembee
ID: 20344562
If a telnet test fails then either something is blocking the traffic or there is a routing problem. This probably has nothing to do with Exchange at all. You could try setting the smart host to send email out through your ISPs SMTP server while you investigate.

Simon.
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Author Comment

by:Musafeer79
ID: 20344578
Thanks,yes for the domain with exch SBS 2003 ,I have created additional smtp connector & used my ISP as smart host & then only i was able to send mails to the problem domain.Other domain I use DNS to forward mails.Do u reckon I should do the same on the exch 5.5 domain.Pls advise steps on what needs to be done on the exch 5.5 server.
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LVL 104

Expert Comment

by:Sembee
ID: 20345515
Can't really help with Exchange 5.5 queries, I haven't seen an Exchange 5.5 server for over nine months. You should try and identify why the two servers cannot see each other. It may be a problem with the ISPs, DNS records etc.

Simon.
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Author Comment

by:Musafeer79
ID: 20353686
Spoken with the ISP guys ,they claiming everything is fine their end.any other test i can run pls.
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Author Comment

by:Musafeer79
ID: 20368051
Could anyone else pls comment on this issue.
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LVL 104

Accepted Solution

by:
Sembee earned 2000 total points
ID: 20373367
This site doesn't work like a forum. You cannot bump questions. Once the question has gone from the first page (about six to eight hours at peak times) no one else will look at it.

ISPs will never admit there is a problem with their network. You need to do the diagnosis yourself and then push them. What will often happen is the problem will fix itself shortly afterwards, but the ISP will still deny anything was wrong. That is how ISPs operate.

If the servers cannot see each other then you have to work out why that is. Tracert, dns lookups and telnet tests will assist with that. See where the traffic dies. If it dies outside of your network, then the issue is with the ISP.

Simon.
0
 

Author Comment

by:Musafeer79
ID: 20435935
Thanks Simon,There was a problem with ISP ADSL in the city where this was installed.I built a replica test server & got it working in my office.Thus forcing ISP to look into the routing in that area.
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