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Very large headers can cause resource exhaustion when parsing message. The message-parser normally reads reasonably sized chunks of the message. Howe…

Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 …

Dovecot accepts dot LF DOT LF symbol as end of DATA command. RFC requires that it should always be CR LF DOT CR LF. This causes Dovecot to convert si…

Module savepoints could be abused to inject references to malicious code delivered through the same domain. Attackers could perform malicious API req…