wifijunkie
Premium
join:2004-02-12
Granite City, IL
| Problems sending email to charter.net
Hi. Not sure if this is the best place for this question, Mod's - feel free to move it wherever you think it best fits...
My mail server cannot send email to users on the charter.net domain. The return email says "connect to ib1.charter.net[216.33.127.20]: Connection
timed out"
When I try to telnet to mail.charter.net 25, I get an error:
"you must connect from charter IP space"
This is the only domain we have problems with. I am able to send to all other domains that I have tried in the last 4 years.
The server is on our T1, I have the reverse dns set to reflect the server's hostname, and I cannot find any blacklist that has has our server listed.
What am I doing wrong? |
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LBDSL
Lightning Bolt
VIP
join:2002-01-07
Auburn Hills, MI | Sounds like Charter has your mail server blocked. Have you attempted to contact them to get more info?
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Lightning Bolt Technologies |
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wifijunkie
Premium
join:2004-02-12
Granite City, IL | yeah, sent email to postmaster (from gmail), no reply. Sent email from their website and was told to call customer support (as if that would help, lol...) |
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tschmidt
Premium,MVM
join:2000-11-12
Milford, NH
 ·Hollis Hosting
 ·Verizon Online DSL
·Fairpoint Communic..
| I assume the "time out" issue is permanent not a transient condition.
Whenever I've run into difficulty sending email from our domain reject message tends to have detail.
You've ruled out being blacklisted and rDNS. I assume you are running mail server on a "real" static commercial IP. What about SPF, have you set up DNS record?
/tom |
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wifijunkie
Premium
join:2004-02-12
Granite City, IL
| Permanent is a good word for it. Has never worked.
SPF is good, I have the entry added to the name servers, has been working properly for 3 years. IP is "real", we have a /24. A tracert shows the last reply coming from 209.225.28-46-charter.net, before "timing out"
Charter.net is the only domain we have problems with. I've talked to a charter business rep, was able to send him email at his chartercom.com address just fine. Also can rx emails from charter.net, just not send to.
To me, it looks like something on charter's end of it, but I don't know for sure, and am having trouble getting any cooperation from them.
Any help is greatly appreciated. Thanks! |
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wifijunkie
Premium
join:2004-02-12
Granite City, IL
| Ok, I think I have narrowed it down somewhat.
On my cisco router that interfaces with the T1, I can telnet to ib1.charter.net 25 without a problem (this is what the MX record points to).
On ANY machine beyond the cisco, it times out. My mail server is connected (through a switch) directly to the cisco, no firewall, etc. I cannot even ping ib1.charter.net from this side of the network.
BTW, ib1.charter.net (mail.charter.net) is the only domain I am having problems with. (that I know of anyway. we've been sending email to the rest of the world since the circuit has been installed, with no problem).
My limited knowledge of cisco IOS is holding me up here. It appears that the router is not passing traffic to ib1 for whatever reason.
Any idea of what I need to look at on the cisco? It is a 1720 w/ version 12.0(5)XQ1. I appreciate any help you guys can offer.
Thanks! |
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