如何禁用电子邮件中的默认电子邮件地址样式？

I'm writing an email template using html table. And there is an email address in the content of this email template. When I sent out this email template to test it, It seems that gmail and yahoo mail always add some default style to the email address in the email content, which will make it a blue, underlined, clickable link. But I don't want these style. I just want the email address to be shown as pure text as others. So how should I get rid of these default style for email address?I'm writing an email template using html table.