On Fri, 23 Jan 2004 22:56, you wrote: > > I have had this rejected a number of times by the receiver as I have no > > reverse lookup for my smtp server as it is on a Dyn DNS setup. > > It's irrelevant whether it's on dyndns or not. Relevant is whether the > IP you are using has any reverse lookup at all. If the ISP you're using > at the time doesn't have reverse lookup configured for your allocated > IP, you're in trouble. Dyndns only provides a name->IP mapping, but not > the reverse. My cable IP has reverse lookup and as far as I can tell, I > never had a problem sending email via smtp directly, dyndns or not.
Yep. If your dial-in/cable/adsl provider assigns you the ip address 123.1.2.3 for the session, then you will have a hostname like: 123-1-2-3.dialup.isp.co.nz or 123-1-2-3.cable.paradise.net.nz for example, right now, a reverse look-up on the IP I'm posting from would resolve to 218-101-92-110.dialup.clear.net.nz, although this will be different next time I dial in. AFAIK all major ISPs do this. YMMV Yuri
