smtp-protection verified
Blocking of abusive clients
in the configuration this is a line
smtp-protection: …Whether the intake blocks addresses that behave abusively, such as repeated failed logins.
Values
- Values
true · false- applying
restart required- where it can be set
in the config file · with a startup flag · as an environment variable
In detail
A brute-force guard on the submission port. Documented as on by default; absent from the stock config, so the effective value is a built-in nobody has stated. Worth confirming before a node is exposed with authentication enabled, since that is exactly the situation it protects.