E-Mails are temporarily stored in table mantis_email_table.
They are deleted from the table after they have been sent.

rasheeda,

This is not a bug or feature request for MantisBT (you are asking for help on how to configure the system). I am therefore resolving this issue as "no change required".

Please use the forums to get support on customizing and using MantisBT (refer to http://www.mantisbt.org/support.php for links and further details).