There are many ways of approaching the problem. Here are a few examples:
SELECT something FROM tbl_name WHERE ((UNIX_TIMESTAMP(now()) - UNIX_TIMESTAMP(msg_col)) <= 259200 )
SELECT something FROM tbl_name
WHERE TO_DAYS(NOW()) - TO_DAYS(date_col) <= 3;
SELECT something FROM tbl_name WHERE date_col <= DATE_SUB(now(), INTERVAL 3 DAY);
Richie.
geocities.com/akindele/