How should one handle religiously motivated hate email?

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I get so much hate mail that I've created a generic response for it: "Dear Christian Hate Mailer, Due to receiving a large number of similar emails, yours is being automatically handled by F.U.C.K.O.F.F: the F)ile U)nder C)hristian K)ooks O)r F)undamentalists F)older system. The recipient of your mail will either reply to your email or just leave you to F.U.C.K.O.F.F. Thank you for taking the time to send your hate mail. -d.a." Given that these are unsolicited, hateful emails that I always get, do you think that my answer is direct enough? PS: please note that not all Christians send hate mail. The only people who receive this are people who go out of their way to deliever a personal message of intolerance to yours truly.