Re: [Exim] Verisign pulls a fast one

On Thu, Sep 18, 2003 at 09:20:40AM +0100, Philip Hazel said:
> On Wed, 17 Sep 2003, Walt Reed wrote:
>
> > Many mail servers fall back to the A record when no MX exists.
>
> I have been saying for many years that it was time this old backwards
> compability rule, which dates from the introduction of MX records, was
> abolished. Certainly since before I started to write Exim, because I
> patched an appropriate per-domain option into Smail.
>
> > BTW, anyone have an ACL that rejects mail when the sender envelope
> > domain does not have a valid MX record?
>
> You can do this by making use of the mx_domains option on a dnslookup
> router that you set up for use when verifying senders (check out the
> verify_only and verify_sender options).

Cool! I'll have to try that out...