On Wed, 20 Oct 2004, Jeff Macdonald wrote:
On Tue, 2004-10-19 at 13:56, william(at)elan.net wrote:
In fact as far as I know
hotmail and couple other webmail servers actually have (or had?) default
anti-spam policies in which they try to match mail-from to From: and
anything else is considered unwanted email (this required whitelisting
every mail-list which was real pain).
Do you have a url stating this fact? I think it is more likely that if
this was truly the case for hotmail it was very short lived.
This was how they were doing it two years ago (maybe 2.5 or 3), which
is part of the reason I stopped using hotmail then. I had to use account
for some webmail access some years ago and also then signed up for couple
mail lists and in all the cases, I had to set filter to whitelist all my
mail lists. As far as I know (based on talking to my brother who's big
fan of hotmail) these policies are still there.
Companies that use ESPs more than likely have different return-paths and
822:From. This is because the ESP will handle all bounce processing for
the client.
I have strong suspision that in addition to user-setup whitelisting they
also had used global ones that accounted for all large ESPs.
But its I would not be surprised to find out that Microsoft got better
at the spam filtering and no longer doing stupid things like marking
email as spam purely based on inconsistant mail-from.
At the same time I also have to note that almost all personal email I
receive has the same rfc2821 mail from as RFC2822 from. And for all
mail lists RFC822 Sender is same as RFC2821 mail from. There are not
really that many cases when you DO want them to be different and even
them RFC2821 value still matches to something like maybe Reply-To header.
---
William Leibzon
Elan Networks
william(_at_)elan(_dot_)net