SpamAssassin doesn't like HTML email without a) a Mime-Version header and b) an <html> tag in the body. Although not everyone uses SA, there are probably other spam systems that implement similar rules. And it's always nice to play nice.
SpamAssassin doesn't like HTML email without a) a Mime-Version header and b) an <html> tag in the body. Although not everyone uses SA, there are probably other spam systems that implement similar rules. And it's always nice to play nice.