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Postfix-Submission policy server that checks sender IPs and blocks senders, if they come from different countries or if they come from too many different IP addresses.

DKIM key management for keys stored in OpenLDAP

Detect illegal UTF-8 encoded headers

Detect illegal UTF-8 encoded headers

Avira SAVAPI command line client

SOGo docker image

Postfix policy service that does rate limiting for senders

This is a set of OpenLDAP schema files

Check the envelope-from address and compare it to the header From:-address. Reject mails, if both addresses do not match

Zabbix template to monitor many common mailserver services

Postfilx milter that rejects/fixes manipulated From:-header

SMIMEA Milter

S/MIME signing milter

Generate spamassassin and rspamd daily reports for used rules

A quarantine for rspamd using SQL as backend