(Sorry last email got set before I finished...)
Ok, you're right - ietf are good with technology and set FROM in the mail
transmission to mailing list (which actually causes some spam filters to
think email is forged), but there are mail lists and forwarding systems
that do not do this and set FROM to the original sender.
My point is that the spammer would just need to use different FROM address
during email delivery and different "From" in the header and majority of
those sending anti-spam reports would use "From" in the header for their
report so they would still think somebody is forging email from your domain.
So to deal with all that I end up having to setup filter to block email
that has different transmission from and header from, which happens for
all mailing lists setup to properly forward emails from you, and I have to
whitelist these mailing lists anyway to accept email and those that do not
incert mailing list into from and keep yours, I'd have whitelist as well.
Well, this works fine for private system, but for ISP it becomes harder
to keep up with all its users' mailing lists.
On 7 Mar 2003, wayne wrote:
In
<Pine(_dot_)LNX(_dot_)4(_dot_)44(_dot_)0303062006490(_dot_)2191-100000(_at_)sokol(_dot_)elan(_dot_)net>
william(_at_)elan(_dot_)net writes:
How is this going to work for asrg(_at_)ietf(_dot_)org email?
Lets say I run this code to check your dnsbl. Now you send email to asrg,
responding to this post, my MTA receives it and goes to your domain
specific dnsbl, it sees that you support it and checks ip address of the
ietf mail server and that ip is not in your dnsbl, so your email is
rejected.
Ah, the email that you are replying to didn't come from my domain, it
came from ietf.org and and a From_ address of asrg(_at_)ietf(_dot_)org(_dot_)
If you
had implemented the check, you would have found that ietf.org doesn't
have a domain specific blacklist, and therefore you should accept
email from asrg(_at_)ietf(_dot_)org(_dot_)
My message to the ASRG list was received by my machine just fine.
(Damn, And I really wanted to read your reply! :)
Yeah, sure you did. ;->
-wayne
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg