using god in chain letters

It seems that ever day I open my e-mail and someone has sent me a story about things like "trusting God" by the time I get to the end of the story the letter informs me that all I have to do is forward it to at least 6 friends and in 24 hours I will be blessed beyond my understanding, but if I don't forward then I will have bad luck. What happend to the fact of the story about trusting God?? I am so sick and tired of getting chain letters. I have found no way of knowing which ones are chain letters. I have asked the ones that have sent them to me not to send them but they are so consumed by the fact that if they don't send them to all they know then they will have bad luck. the only other step I have is to block there e-mails but I don't want to do that because some of the e-mails are good. I don't know what to do. I pray that this person would just trust in the one true one who can bring peace?