Hi all,
I am one of the mail admins at a small ISP and we have been
getting repeatedly put on the sbcglobal, bellsouth.net, and att.net
local block lists. Once we were finally able to get in touch with
someone they told us that we were being blocked because of allowing some
of our customers, that are on our network, to send out through our
mailserver. These customers use another provider for mail hosting but
would send out through our mailserver. Now because of this it was
decided that we would implement smtp-auth and not use the ip-base
allowed sending within qmail-smtpd.rules. My manager keeps telling me
that there is an RFC that wasn't followed very closely in the past that
we should follow and that is why it was decided to move in this
direction. With all this being said I have 2 main questions (probably
just to start with).
1. I do not understand how allowing our customers to send through
our mail system is doing anything different then ATT&T is. From what I
can find on the net they block all port 25 traffic on there network and
force all there customers to send out using there mailservers. So even
if you wanted to use your mail provider to send your mail out you could
not.
2. I have tried reading up on the RFC's for email to see if I
could find what everyone here is talking about but I am having problems.
If there is anyone out there who understands what I am talking about, I
would really appreciate it if you could point me in the right direction.
A little paraphrasing would be a big help also.
I am sorry if this should have been posted elsewhere but I am running
out of hair to pull out.
Thanks a ton in advance.
Jake
