Fred Viles wrote:
>On 29 Aug 2005 at 9:07, Craig Whitmore wrote about
> "[exim] Blocking non-existant Domain":
>
>| I've noticed that Exim accepts non-existant domain names in the mail from.
>
>Not by default, it doesn't.
>
>| Has anyone an ACL which will block this? (ie if looking up a domain and
>| getting NXDOMAIN) to give a fail in the mail from acl (or similar)
>
>In the sample config file, the following stanza in the RCPT ACL will
>reject messages with unroutable sender domains:
>
> # Deny unless the sender address can be verified.
>
> require verify = sender
>
>
You're going to get a lot of false positives if you do this because if
there's a server problem in verification of the sebder it's going to bounce.
I wonder if there is a way to distinguish a DNS error from a domain that
doesn't exist?
