On 15/09/23 17:51, Reindl Harald (privat) wrote:
limit the connections per hour on smtp-ports with iptables xt_recent
and configure postfix properly
anvil_rate_time_unit = 1800s
smtpd_client_connection_rate_limit = 100
smtpd_client_recipient_rate_limit = 400
smtpd_client_message_rate_limit = 400
smtpd_recipient_limit = 100
Wont help much if you have 100k different IPs connecting, and you also
have high volume legit customers
--
Best regards,
Riccardo Alfieri
Spamhaus Technology
https://www.spamhaus.com/
