Slackware.com Majordomo lists
Does anybody know who looks after the Majordomo list server, and for that case the mail server, of Slackware.com? I'm trying to change my subscription address for the slackware-announce and slackware-security lists. I was able to unsubscribe from my old address fine, but trying to mail majordomo@slackware.com from a new mail system I've just setup on my own domain (mvtech.ca), I never receive any response back from Majordomo, not even from a "help" command. I'm guessing that my mail is being rejected for some reason, even though I see from my sendmail logs that it is being delivered successfully, and I am able from my server to send and receive mail to other sites fine, including GMail and Hotmail. I was able to get Majordomo to send me a confirmation email to the new address when I sent a subscribe command from another address, but then was unable respond to that email to complete the confirmation. This makes me suspect that slackware.com's mail server thinks my mail is spam and is rejecting it for some reason.
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Check your server's outgoing mail for any filtering of spam mail being sent, and make sure you have the protocols for sending outgoing mail configured in the firewall, if you run one.
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No outbound spam filtering being done, only inbound, and per /var/log/maillog, I can see that the mail is being accepted on slackware.com fine. It's what happens after it gets there that I'm wondering about.
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I guess maybe it has to do something for the mx to be on a dial-up connection (and the reverse address not resolving properly)
Code:
$ host mx.mvtech.ca |
That's what I was thinking, but that shouldn't be a reason for a mail server to reject mail, should it? This is not an abnormal situation for anyone owning their own domain and setting up a SOHO network. As long as there is a PTR record for the IP address, it shouldn't matter if the name matches or not, as long as the PTR record returned when looked up gives the matching IP address, which it does in my case.
Code:
$ host 198-48-197-226.cpe.pppoe.ca |
Just for fun, I decided to write Teksavvy's support site to see if they could supply me with a static IP and change the PTR record in their DNS, and this is the reply I received:
"Thank you for this inquiry. We are sorry to have to inform you that we do not have static IP's for our Cable internet customers. We only offer these to our DSL customers. Again sorry that we could not help you." So if this is the reason my mail is being rejected at Slackware.com, and possibly other sites, the only other solution for me is to send my mail via another mail server or service, or configure sendmail to use a "'Smart' relay host"... but then what's the point of setting up your own mail server? :-( |
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slackware.com's mail is filtered through the anti spam service in place at the ISP in which our web server lives. This is most likely what is eating your mail. |
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I also did some Googling and understand that AOL.com also supposedly does this. Just to test, I did a telnet to port 25 of one of their mail servers, and got this: Code:
$ telnet mailin-01.mx.aol.com 25 |
Have you looked into Dynamic DNS?
It's not the same as having a static IP but it can help when DHCP fails you, and you need a constant addressing scheme. http://www.dmoz.org/Computers/Intern...s/Dynamic_DNS/ |
Dynamic DNS won't be of help in this case, because no matter what DNS provider I choose, if someone decides to do a PTR lookup on my IP address, it will always return the value assigned by the owner of the IP address' DNS server. In my case, it will check Teksavvy's DNS servers, and return the PTR value from there, even though I purchased my domain from and use the DNS services of Hover.com.
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Long-term solution: Get yourself a IPv6 tunnel. They are free (tunnelbroker.he.net) and provide static addresses including DNS mappings. Although you won't reach @slackware.com this way, because their mail server still lives in the past. ;) |
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(In case anybody is wondering, the above is a joke. Although, when I first started using Slackware back in 1994, the above was true.) BTW, I did get a very quick response from Slackware.com's ISP Succeed.net confirming that yes they are rejecting my mail based solely on the PTR record, but when I asked them why they have this policy, they weren't so quick in responding back... we'll see if they actually do. |
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