Author: Artem S. Tashkinov Date: CC: Exim, Users Subject: Re: [exim] Ultimate spam defense - check for the sender MX record
Peter Bowyer wrote: > On 27/12/06, Artem S. Tashkinov <dummy@???> wrote:
>
>> I would like to increase a spam defense of our server by checking if a
>> sender really represents an MX server of his/her organization. So if a
>> certain PC is trying to send me an e-mail from user@??? then we
>> will check if this person's IP address is within MX servers of
>> domain.com, otherwise we'll refuse to accept the mail.
>
> This is misguided. There's no useful correlation between outbound mail
> relays and inbound MXs for a large proportion of the internet. Don't
> do it.
>
> Peter
>
OK, I see I was wrong. I just wanted to implement it because some
prominent unix person had suggested this way of struggling with spammers.
