I learn something every time I read this group, when I can keep up with
the conversation!
I had auth on ports I did not need. I use auth on submission port 587,
for users access.
I do get a boat load of failed login attempts on 587. Funny how a China,
US, Argentina, you name it, hosts, will try the same failed username
password at nearly the same time.
Small world.
I use Fail2Ban to block the failed IP. The script writes it into the
nftables table immediately.
I think this keeps Postfix waiting and times out, not a big deal. Is
there a cli that my bash script could force disconnect the ip from Postfix?
I did search the man page and the docs, sorry if I missed it.
Thanks
--john
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