If you're recently configured your sendmail daemon and get the following error after a MAIL FROM:
553 5.0.0 .com<TMPF<TMPF>... Unbalanced '<'
Then you likely compiled with mailertable support but don't have a mailertable.db file. The solution is to just create your mailertable file. Usually like this:
makemap hash /etc/mail/mailertable.db < /dev/null
Greenview Data, Inc.8178 Jackson RoadAnn Arbor, MI 48103