Monks,

I'm trying to stop bogus Russian hackers who use bogus email addresses. I'm trying to detect more than 2 dots in an email string. For example, test.test@gmail.com is fine, but test.test.test.test@gmail.com is not. The following seems to work, but I wonder if someone can validate what I have. I first detect if there are two at signs that signal they are trying to bcc others, and then I look for a comma, and then the periods. Is this right? 

if ($sender =~ /\@.*\@|,|\..*\..*\.|\n/i) {

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Thanks.

In reply to Stopping excessive periods in email by htmanning

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