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Outbound mail policy queue limits and suspensions

POSTED BY: postfix_expert ACTIVE_MEMBER POSTED ON: Jun 21, 2026 CATEGORY: GENERAL
A compromised WordPress site is sending bulk spam emails. How does the mail policy daemon handle this?
8 Total Upvotes

REPLIES (1)

security_enforcer ACTIVE_MEMBER SOLUTION_ACCEPTED 2026.06.22 10:50
The mail daemon `booston_mail_policy.php` acts as a milter. It monitors hourly outbound volumes per user. If a user exceeds the threshold defined in `mail_settings.json`, it suspends their postfix transmission queue immediately.

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