[Mailman-Users] Trouble with mailman external responses

Barry Warsaw barry at python.org
Wed Mar 7 17:12:50 CET 2007

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On Mar 7, 2007, at 11:04 AM, Mark Sapiro wrote:

> Paul has addressed your main question. I just want to add that you may
> have problems trying to run Mailman from a server with a dynamic IP.
> Earthlink.net for one will not accept your mail. The same is true for
> some smaller ISPs. They don't like IPs with a 'generic' rDNS.
> Depending on exactly which ISPs are used by your list members, you may
> not be able to send mail to all of them unless you have a fixed IP,
> and rDNS for the IP that points back to your domain.
> I had the same issue with sending mail directly from my home  
> network. I
> already had a static IP, but it had a generic name. I had to register
> my own domain and get the ISP to set rDNS for my IP to point to my
> domain.

Which ISP do you use?  I have a static IP from my cable company but  
they refuse to give me an rDNS entry.  In every other way, I really  
like them, but I do get bounces occasionally from people's (IMHO)  
misconfigured MTAs who don't accept mail from cable rDNSs.

- -Barry

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