On Fri, Sep 15, 2000 at 02:14:49PM -0400, John Ackermann wrote: > In message <[EMAIL PROTECTED]>, staf wagemakers writes: > > >You could add the next line to your /etc/mail/sendmail.mc > > > >FEATURE(accept_unresolvable_domains) > > I regularly see "domain must resolve" messages in my logs, usually from > random sites Out There. Is there a significant security/spam risk in > accepting unresolvable domains? I have the antispam stuff (no relaying, > etc.) turned on in my sendmail.mc already.
Normally you don't want to accept mail from non-valid domains, all from addresses should have a valid internet address. I don't think your mailserver get a open relay by enabling this "feature" but I wouldn't use it on a mailserver that is connected to the internet. You can't reply to message because it comes from a non-existing domain, so why would you waste time to read it :) -- Staf Wagemakers email : [EMAIL PROTECTED] homepage : http://www.digibel.org/~staf