[wellylug] Re: CA-CERT Assurance

[Sam Cannell]

The general idea was to put a TXT record in your domain with a list of
addresses or netblocks that were allowed to transmit mail from an
@yourdomain.foo address.

So when your smtp server receives a message, it can check that the
connecting address is listed in the record.  If it doesn't exist, the
message is more likely to be spam.

It's not perfect, but it's by far one of the better ideas I've heard
recently.

-----Original Message-----
From: wellylug-admin at lists.naos.co.nz
[mailto:wellylug-admin at lists.naos.co.nz] On Behalf Of Enkidu
Sent: Friday, 4 June 2004 6:55 p.m.
To: wellylug at lists.naos.co.nz
Subject: Re: [wellylug] Re: CA-CERT Assurance

>Personally, I like Microsoft's DNS caller-id system as a solution for
>spam.  It requires no changes to existing protocols - it works
alongside
>standard SMTP and nothing forces you to test the validity.

What that? Is it just requiring reverse lookup or is it more than
that? I did read it at the time, but it's slipped my mind.