Parsing returned emails using RegExp

[arlequin]

Hello, folks,

In the office we send a massive email once per month (it's NOT spam), but some addresses bounces as invalid.

Well, I want to process all the returned mails using the great Bash text parsing tools such as regular expressions.

I have one large file containing all the bounced emails and want to extract only the email addresses and avoid some like 20040125AAAGGGGASFSFASAS@myserver.com

How can implement that using reg exp?

Thanks in advance.

Arlequín
arlequin_AT_internet_DOT_com_DOT_uy