Documentation

Transport rules

Transport rules let administrators modify incoming and outgoing mail on the server, before it is delivered or placed in the queue. When they apply Rules take ef…

Cet article est affiché en anglais ; il n'existe pas encore de version française.

Transport rules let administrators modify incoming and outgoing mail on the server, before it is delivered or placed in the queue.

When they apply

Rules take effect after the raw MIME blob has been stored, but before the sent copy is created and before the message is delivered locally or remotely. Changes therefore reach every recipient as well as the sent copy.

Conditions

Field	Meaning
`from`	Sender address
`to`	Recipient address
`subject`	Subject line
`body`	Message text
`any`	Every message

Comparison	Meaning
`contains`	contains
`equals`	is equal to
`starts_with`	begins with
`ends_with`	ends with

Regular-expression comparisons are deliberately not supported, to rule out ReDoS attacks.

Actions

Action	Value
`add_header`	A header line, for example `X-Custom: yes`
`prepend_subject`	Text placed before the subject
`append_disclaimer`	Disclaimer text appended to the text part

Order

Rules are evaluated by descending priority. Several rules may apply to the same message in sequence.

Quelque chose est peu clair ou mal décrit ? Dites-le-nous — nous corrigerons. Votre question nous montre où le texte est insuffisant.