Clean out the sql maillog used by mailwatch?

[Furnish, Trever G]

For all mailwatch users (and perhaps for users of the "default" sql logging
code as well - I didn't check that schema), how do you prevent your
mailscanner maillog table from growing indefinitely?

I'm thinking of running the following statement, but I'm not sure that the
"date" column is populated with reliable data - ie if a spammer forges the
date, is the forged date possibly stored in the date column?

delete low_priority quick from maillog where date < (curdate()-7);

If that's the case, then I would expect to have to use the timestamp column
instead:

delete low_priority quick from maillog where timestamp < (now() - interval 7
day);

I'm hesitant to actually run these for fear that I'll screw something up I
don't yet know about, but I don't really see anything in any of the other
tables that refers to the maillog table so I think it's safe.

I wouldn't expect deleting the rows to actually reduce the size of the data
file used to hold the table though - any mysql guru's care to share how to
do that (or to point out problems with the statement above)?

--
Trever