Locking down secondary mx sendmail
Ruben de Groot
ruben at bzerk.org
Wed Jun 4 06:12:11 PDT 2003
On Tue, Jun 03, 2003 at 03:16:15PM -0700, Doug Silver typed:
> It seems the spammers like to target secondary mx machines and let those
> machines relay the email to the primary machine. I've tried setting up the
> virtusertable file to at least reject invalid emails on the secondary mx
> machine, but it seems that sendmail bypasses that when it's doing mx relaying
> for that domain. So, does anyone have some suggestions to partially lock
> down mx relay machines?
Do you have something like
in your secondary mx machine's .mc file?
After that remake sendmail.cf and put the right domain names in
I haven't tried this but I think it should work.
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Everyone has a scheme that will not work.
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