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On Wed, 2024-02-07 at 10:51 -0500, Phil Stracchino via Postfix-users
wrote:
> On 2/7/24 10:41, John Hill via Postfix-users wrote:
> > Good info.
> > 
> > This site sends nothing but junk. IN fact the domain is known for
> > it.
> > I tried just rejecting the email address. But they just change it.
> > So I blocked the IP, they have several.
> 
> Have you considered blocking the *domain* with a 50x error (permanent
> fail)?

Amen.  My blocklist contains a mix of domains and individual addresses
(predominately gmail/outlook/hotmail/yahoo). Blocking the whole domain
can be more effective than blocking the individual addresses (which can
theoretically be a long list). Unless you have certain email addresses
from that domain you _need_ to receive mail from either whitelist just
the addresses you know are legit and block the domain (assuming there is
more than one address sending spam/virus/garbage). Or you could go down
the path most MS hosted domains do, and send everything to SPAM folders
unless the address/domain is in someones contact list (probably means
writing a filter that can communicate with a CardDAV server).

- -- 
Nikolai Lusan
Email: niko...@lusan.id.au
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