[NCLUG] comcast blocking port 25?

Bob Proulx bob at proulx.com
Mon Mar 26 14:13:55 MDT 2007


Bob Proulx wrote:
> DJ Eshelman wrote:
> > Now for the question:
> > Is it possible for mail from a dynamic IP to have a reverse DNS
> > entry?
> 
> Not usually.  It is possible if the folks authoritative for that IP
> address block allow and enable dynamic dns updates.  This is typical
> on the local network but I have never seen the big ISPs provide that.

And by this I mean a reverse entry that maps to the current hostname.
Most dynamic IP addresses have reverse dns entries.  They just don't
mean very much to say 5-10-24-18-dyn-ip.example.com.

Bob



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