Pete Ashdown writes:
>
> Part of the problem I have with blocking all relaying is that our mail
> server acts in a legitimate function as a relay for hosts that are
> unreachable at the moment. Any ideas how to prevent one kind of relaying
> (ie: for spam) and allow another?
If you are talking about incoming mail, then just set relay_domains to
cover any domains, in addition to local_domains, that you wish to accept
mail for from the outside world. Normally this would be the same set as
"domains that I have agreed can have secondary MX records pointing at me".
Note that the value can include items like "*.my.org", or regular expressions,
if you are configuring an organisation-wide backup mailhost.
Chris Thompson Cambridge University Computing Service,
Email: cet1@??? New Museums Site, Cambridge CB2 3QG,
Phone: +44 1223 334715 United Kingdom.
