Pigeon wrote:
My mail server is neither an open relay nor a source of spam
> pigeon.dyndns.org # host pigeon.dyndns.org pigeon.dyndns.org has address 213.162.113.17 # host 213.162.113.17 17.113.162.213.in-addr.arpa domain name pointer pigeon.adsl.metronet.co.uk. # host pigeon.adsl.metronet.co.uk. Host pigeon.adsl.metronet.co.uk not found: 3(NXDOMAIN) Your IP has reverse DNS, but no forward DNS.That just doesn't cut it anymore. The days when computer geeks can put a mail server on a dsl connection and expect to deliver mail, are over.
There's so much garbage coming from dsl connections nowadays, that many ISP's block all mail originating from dsl and/or dynamic IPs. It's 98% (or more) spam/virus/garbage anyway, so who cares if they lose 1% or 2% which isn't?
You can either relay mail thru your ISP's server, or rent a VPS where you have an IP address with matching forward and reverse DNS, and run a real mail server there.