Hello list, may I pick the accumulated wisdom and experience?

any useful traffic from these subnets:

18.32.0.0 - 18.255.255.255 Amazonaws.com
34.4.5.0 - 34.63.255.255 Googleusercontent.com

I am thinking of just dropping them at the firewall and call it a day. I have not yet advertised my super clean new mail server and there is already a stream of abuse.

also from:

64.62.197.0/24 shadowserver.org
141.98.10.0/24 hostbaltic / tiscali.it?

I know rspamd could deal with that, but in the cloud compute resources have cost and I am looking for the most radical, simple, compute-efficient solution to keep bad networks out. Are there community-maintained efforts, like the https://github.com/StevenBlack/hosts for hosts?

Thank,

Yuv
--
Ontario-licensed lawyer

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