Re: [Exim] Stopping Unknown users via MX spam attempts?

On Wed, 29 Oct 2003, Bob Tanner wrote:

> We I think I'd like to do is receipient verification(?) of the envelope?
>
> Something like, mx-spam comes into mx1 for adam@???, exim on mx1
> callsout(?) to mail.company.com and tries to verify adam, if "User Unknown"
> is the return value, mx1 would error 5xx the mx-spam.
>
> Is this possible?

perfectly, just do recipient verification with a callout (see
section 37.12 of the fm).

--
[-]
... and the rest is silence.