Mailing Problem

Currently I have the intouch plugin to allow people to contact me. I have also tested another plugin too, but I didn’t work. I host my own blogging and am wondering if I have evertything required to use this type of tool. When I try to test my contact form with intouch it tells me there was an error and the message could not be sent. I tried to e-mail the creator a few days ago and never got a reply back. I was just wondering if anyone else out there had any ideas. Thanks for the help.