On 2022-09-05 at 16:51:34 UTC-0400 (Mon, 5 Sep 2022 23:51:34 +0300)
Atro Tossavainen via mailop <mail...@atrotossavainen.fi>
is rumored to have said:
Regarding the above, I have the following question:
What do you (and maybe other people on the list) think about such
email
verification method ("abusing RCPT TO") used as part of:
a) mail receiving process - I'm thinking here for example about the
Postfix
feature "reject_unverified_recipient" that checks sender's email
using this
method before accepting (or rejecting, if sender's email doesn't
verify) the
message (see http://www.postfix.org/ADDRESS_VERIFICATION_README.html
). Some
other MTAs have similar features too, there are also milters that do
this.
Yes, Sender Address Verification is abusive as well because it causes
the systems doing it to woodpecker on anybody whose addresses are
forged
as senders in spam.
And so is Challenge/Response based spam filtering.
Yes, of course, but he said he is using "reject_unverified_recipient"
which is RECIPIENT address verification, a tool which is used to prevent
backscatter on machines that do legitimate relaying of mail.
But his phrasing does confuse that...
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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