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winkelman

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Maybe stupid, but just trying to help:
Are you sure you're actually pinging the server contained in the MX record of their domain?
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bperkins

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Not stupid at all....

I'm pinging what shows up under the "server" column in the Mail Queue Processing tab in the admin console. I'm pretty sure I'm pinging the correct server.

I don't know how, but all indications are that they have blacklisted me somehow. I don't think it is something wrong with KMS now after investigating this, but not positive.

Thanks for the help. I'll post again if I find anything out.
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sedell

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Did you try to telnet over to the remote server to see what responses you get?

Scott
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sedell

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I just had another thought. Do an MX lookup with a remote tool, such as http://www.dnsstuff.com/ to see if your server is using a bad cached record.

Scott
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bperkins

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That's some good information sedell.....

I can ping the host. I cannot telnet to port 25 on the host. Using the website you gave me, there is an A record, but no MX record for this host.

Would this be the ultimate problem?

Many thanks,
BP
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sedell

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If there's no MX record, the server should try to deliver to the address specified in the A record.

I guess the big question is why you can't connect on 25 to the host in the A record. Have you ever received mail from that domain/host? Just wondering if there's actually an SMTP server running on that host. If not, problem solved.

If there is, there's the issue of why you can't connect to it. If you're blacklisted by the mailserver, you should get a response as such. If you've been blocked at a gateway or firewall level for some reason, or if for whatever reason port 25 is blocked between you and the host, there won't be any response at all. The only way to test that would be to try and connect from another location/IP address and see if a connection can be established.

Of course, there's still the issue of why the mail is still in your outbound queue. What do you have 'Return the message to sender if not delivered in:' set to?

Scott
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bperkins

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Thanks Sedell! I've thought of all of those questions. I'll let you know what I find out. I have the return to sender set at 3 days.

BP
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bperkins

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One of my users (the one trying to send email to this person) found an old email. So, I looked at the headers of the email and I was able to verify IP numbers that I had gathered.

I was telneting and pinging the right server. Since I can ping the person, but get no port 25 response whatsoever, they must have me blocked for some reason.

Thanks for your help sedell and winkelman. Sedell, thanks for that website, very handy.

BP
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sedell

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My pleasure. I find that site to be very useful myself.

[Updated on: Mon, 24 October 2005 17:28]


Scott
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pwhodges

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steved7127 wrote on Mon, 27 June 2005 12:42

(gtukdex2.gtuk.com: Cannot connect to remote host)

That server is not responding for me either. But the domain has two other servers with higher priority MX records which are both responding, so mail ought to be delivered without problems.

Paul
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