Hi their i'm new to this site so hope i'm doing this right,so here goes.I'm having problems sending emails to comcast.net email adresses in using incredimail.The failure notice read you must have a reverse DNS to send mail into 450 There is a failure in your reverse DNS lockup.You must have a reverse DNS entry to send into the comcast.net domain,please correct the error.I'm not sure what any of this means......many thanks