Originally posted by: keyboarder2k

Hi there,

I'm trying to build a grep command for a script (korn-shell) which looks for valid mail addresses. This is, what I have so far:

grep -e 
"^[a-zA-Z0-9][a-zA-Z0-9_\-\.]*[a-zA-Z0-9]@[a-zA-Z0-9]*[a-zA-Z0-9_\-\.]*[\.][a-zA-Z]\{2,4\}$"

But there are some thinks, it doesn't find (are valid, but should not be):

• German "umlauts" (ex: müller@example.com)
• two special characters (ex: mail..address@example.com)

And there are some false negatives (are not valid, but should be):

• ex: name@exam-ple.com

Is there anyone who can help me to build a "perfect" regular expression for my grep to find only valid mail addresses?

Thanks, Janko
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