Is my DNS a Mess? Probably!!
We don’t have time and space here to fix all those problems, but I’d like to concentrate now on:
How to Keep Your DNS from Blocking Mail Delivery from your and your Clients’ Mail Servers
Short, snappy headlines rule, OK!
IPv6, when widely implemented (you do have a plan, don’t you?) will fix a ton of Internet security problems. Until Nirvana arrives, we’ll have to do the best we can with the (DNS) technology in hand, which is a lot better than than mess we’ve got now.
Since I’ve become involved with postfix, a wonderful Mail Tranfser Agent (MTA) by Wietse Venema and IBM, used as the basis of my IMGate project (see link in left column), I’ve learned a lot about how advanced MTA’s such as postfix, qmail, and the latest version of sendmail can be setup to triangulate and validate any other mail servers who want to send them mail.
Using postfix as as example, just take a look at this page: Continue reading »