Linked ticket with changeset: r8964
Action performed by Anonymous (I am too lazy to register) on Sep 30th 2008, 15:49
When a regular user (peon) sends a private message to a usergroup, and another peon in the group has messages disabled from other peons disabled, it will still relay the message.
Detailed example:
Bob, Dale, and Sue are all members of the Active user group.
Bob has Private Messages from users disabled.
Sue is an administrator and is the group leader.
Dale sends a message to the Active user group, and both Bob and Sue will receive the message, despite Bob disabling the Private Messages.
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According to the forum's admin that this issue occurred on (I'm not an admin, moderator, or a server host, just a regular user), he recently upgraded to the latest phpBB3, which I'm sure is 3.0.2. I'm not sure if this is more of an intentional feature, rather than a bug, but I personally classify it as a bug due to this being abused to send spam.
I can provide more info at your request, and if I receive cookies and beer, a patch file (: