On Wednesday 03 September 2003 02:09 pm, HaywireMac wrote: > On Wed, 3 Sep 2003 13:51:49 -0400 > > Bryan Phinney <[EMAIL PROTECTED]> uttered: > > I don't think that it would be too hard. I could do a DNS query for > > an MX record and if you don't have one, simply deny the connect. If > > you are running a real mail server, you should have an MX record on a > > DNS. Dynamic ranges won't have those because they are dynamic. > > How does one "register" a mail server? Could I not register the one I am > using, and get around it that way? > > My setup at Zoneedit.com allows me to add a mailserver, what if I just > put mail.orderinchaos.org?
Might work for some but might not for others. A reverse DNS on the IP won't show Zoneedit as the owner of the dynamic IP, it will show the ISP that the IP is assigned to. Trying to connect to a MTA that does reverse lookups would get you denied because the IP would not match the domain that you report. If they are doing that check. I don't think that there is any real substitute for a static IP assigned through a registrar. I think that in order to run a mailserver with a dynamic address, you have to use a mail reflector to bounce mail through. -- Bryan Phinney Software Test Engineer
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