Sendmail cfg question

ec3042 · 08-13-2006, 05:02 AM

A bit bored of getting spam sent to the standard "service", "root", "webmaster", etc., etc. accounts on my box.

I only have a handful of users on the box so i can configure manually, but how to i setup sendmail to ONLY allow incoming mail for valid usernames? I guess i'd still want "root" to be a vaild email address internally for system messages etc.

As is obvious from the title, i'm running sendmail

Many thanks in advance!

cdhgee · 08-14-2006, 03:08 AM

Sendmail is configured to have this behaviour by default. If you want catch-all it's something you would have turned on manually. The other stuff you're getting is probably because there are aliases configured in your default installation. Check /etc/aliases and comment out any you're not using - e.g. webmaster, postmaster, info, service, etc. Leave root though as it is a kosher account name.

ec3042 · 08-14-2006, 02:25 PM

OK, I'll try that, thanks. Anyway I can only allow root to receive emails from within my network, and reject mails from outside?

cdhgee · 08-15-2006, 03:10 AM

There may be a way, I can't think of it off the top of my head. The only thing that immediately springs to mind would be to run some filtering program that filters out messages to root if received from a particular IP or range of IPs. Again though I don't know if such a program exists, though it's probably possible to write one - it's the same sort of filtering mechanism as a spam filter would use, only much less complex.