Jonathan de Boyne Pollard wrote:
> detection. It's also perfectly possible for the unique domain name
> used to identify a mail system to not have mappings (to IP addresses,
> content DNS servers, or SMTP Relay servers) in the public DNS database.
> It's _solely_ an arbitrary unique identifier for server-side loop
You wouldn't try that for a place like Barclays.
On the other hand, you would definitely want to put in such rules for
places like yahoo - HELO *.yahoo.com is not a valid HELO when connecting
to your MX when it comes from an IP without yahoo.com rDNS. Note: if you
are running MX and outbound on the same box, check that it's not an IP
you'd relay for / or an IP from where someone's authenticated himself.
srs
--
linux@??? (Suresh Ramasubramanian)
jaharkes@ravel:/usr/src$ mv linux Gnu/Linux
mv: cannot move `linux' to `Gnu/Linux': No such file or directory
jaharkes @ cs.cmu.edu in reply to RMS on linux.kernel
