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pmg-mail-filter: clarify matching of Who objects

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In particular, explain that Who objects match against Envelope From
and Envelope To, not the From: and To: mail headers. This is
occasionally a source of confusion in enterprise support.

Signed-off-by: Friedrich Weber <f.weber@proxmox.com>
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Friedrich Weber 2025-02-17 12:55:17 +01:00 committed by Thomas Lamprecht
parent 516fc90b7a
commit dacc38fe64
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pmg-mail-filter.adoc
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@ -265,6 +265,19 @@ We have two important 'Who' objects called 'Blacklist' and
'Whitelist'. These are used in the default ruleset to globally block
or allow specific senders.
Note that 'Who' objects match against the mail addresses given during the SMTP
dialog:
* 'Who' objects in the 'FROM' category match against the sender's mail address
given in the `MAIL` command (the Envelope From).
* 'Who' objects in the 'TO' category match against the recipient's mail address
given in the `RCPT` command (the Envelope To).
These addresses are also visible in the logs and the
xref:pmg_tracking_center[Tracking Center].
If you want to match against the `From:` or `To:` header fields of the mail,
use a 'What' object with type 'Match Field' instead.
[[pmg_mailfilter_what]]
'What' objects