[How-To] Block SASL failed login attempts through CSF

[AlexG]

Hi there,

Today I want to share a way to block failed login email attempts through CSF (Config Server Firewall) to avoid several attacks to your email accounts or clients email accounts in an automatic way.

Complete Post Here

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Works great with CWP v0.9.8.781+ (CentOS 7)
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Let me know if this method works on your end.