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Message acceptance

Just after when Sympa's daemon fetches an incoming message from the incoming spool ($SPOOLDIR/msg directory), it executes some sorts of inspection on the message, and will ignore the message that does not meet certain requirements.

Additionally, list owners may choose customized policies based on authorization scenario so that they can control message acceptance.

Checkpoints built in Sympa

Some of requirements by Sympa are mandatory and the others are optional. The messages ignored according to any of requirements will be kept in the bad directory in incoming spool and will no longer be processed.

Existence of mandatory header fields

Loop prevention

See also "Loop prevention".

The other criteria

Check by authorization scenario

The list owner can choose send authorization scenario to control who can send to the list (See also "Authorization scenarios" and "send" parameter).

This scenario may return one of following results:

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