mailq delete with notifying senders?

Hello,

Three newbie questions!

1. Is there anyway that Postfix can send a notice to
the sender when I manually delete his/her mail in the
mailq using "postsuper -d MSG-ID" command ??

2. Is it possible to log subject lines of the mails?

3. Can I change the postfix's logging style so that it
logs sender address and receiver address on the same
line?

Thanks in advance

--yogesh

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