On 2007-07-20,
headnet2@googlemail.com <headnet2@googlemail.com> wrote:
> AOL have a facility with their e-mail that only accepts mail from
> addresses in the indivual's address book Is this unique to AOL or
> can it be used with other servers ie Yahoo?
>
> Richard
As far as I know, neither GMail nor Yahoo Mail provide a
straightforward way to only accept messages which are purportedly
from senders in your address book. However, this is not a widely
accepted method of blocking spam because (1) the From: header is
easy to forge, and (2) what if someone new wants to send you an
email?
What GMail and Yahoo *do* support are two effective and flexible
means of recognizing non-spam messages, Sender Policy Framework and
DomainKeys/DKIM. You can read about them here:
http://antispam.yahoo.com/domainkeys
http://www.openspf.org/Introduction
Since you're asking about Yahoo in comparison with AOL, I take it
that you're considering switching email service providers. In that
case, I highly recommend GMail -- it's very good all around, and its
spam filter is top notch (which would make sense, come to think of
it; filtering spam does fit within the company's core competency of
organizing information).
--
Mark Shroyer
http://markshroyer.com/