On Fri, 27 Jul 2012, Brian Parish <bmp@sepit.com.au> wrote:
1. If you don't have reverse DNS some servers will reject you - certainly still happens to our customers now and then
Where "some" means something less than 1% of all servers and something less than 0.1% of all email addresses. I send mail to lots of people, I can't remember the last time I had a message bounce due to reverse DNS, it would be many years ago. Even when a server with thousands of accounts has a reverse DNS issue it's usually months before someone notices.
So, I would suggest keeping your own house in order, but not assuming that anyone else does is (as usual) the line of least resistance.
The definition of "in order" for modern mail servers doesn't seem to include having reverse DNS. # nc lists2.luv.asn.au. 25 220 tainted.luv.asn.au ESMTP Postfix (Nothing to see here, move along...) It's interesting to note that the name that the LUV server is configured with doesn't match the DNS name. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/