On Fri, 17 Dec 2004, John W. Baxter wrote:
> This actually makes sense, I guess, in that it saves the spam engine the
> need to make numerous DNS queries, which might make discovery more likely.
> But it also means you can "dodge" some of the spam engines by playing games
> with changing your MX IP addresses now and then, provided customers don't
> connect to the MX machine(s).
In April 2003 we changed the MX records for the hosts I use for email so
that incoming mail was directed via our central servers (that do spam
checking). We still see a lot of direct connections (that we reject, of
course). It is not yet 10 a.m., and there have already been over 1000
today.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book: http://www.uit.co.uk/exim-book
