I never had any problems with DDoS of our email servers.
If we have one, we're gonna
1) check that our MTA is up to date 2) check that we got fail2ban rules for POP&SMTP failed logins 3) use a haproxy and ban by subnet/country
1) check that our MTA is up to date 2) check that we got fail2ban rules for POP&SMTP failed logins 3) use a haproxy and ban by subnet/country
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