In my experience, the right combination of DNSBLs are extremely
effective, typically well into the 90% of delivery attempts can be
rejected before the DATA command (and therefore before SpamAssassin)
with a combination of DNSBLs, RFC validations (greet pause of 11
seconds, early talkers rejected),
On 26 Jan 2019, at 17:02, Ian Evans wrote:
Recently checked my logs and noticed that the rbl checks in postfix or
SA
were sometimes getting blocked. So I finally installed a caching DNS
server.
Suddenly the spam that gets to my spam folder is down to five or so a
day.
Seems postfix is
Background: I run a small postfix/dovecot server on my site server. Just a
handful of careful users. My spam folder would only have about 10-30
messages a day marked as spam by spamassassin. Server's running denyhosts
to help block bad actors.
Recently checked my logs and noticed that the rbl
