Tanmaya
Unless the mass mailing policy has changed in the last couple of months I don't think this is applicable. This is something that has occurred from late July onwards (see http://support.jodohost.com/showthread.php?t=7951). We've had sites working quite happily up until this point then...
The script uses the php mail function. Jodohost have made changes to their web servers that virtually render this unusable. According to Jodohost support this is an anti-spam measure and they recommend using phpmailer instead. There has been no announcement to my knowledge that this was taking...