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by Tautologistics 4766 days ago
Forgot the SOL/EOL markers; the above will still match a substring, e.g. xxx@xxx@xxx.com. Try:

^[^ @]+@[^ @]+$

That said, HTML5 has something even better if the input is expected to be an email address: input@type=email

See http://www.w3.org/TR/html-markup/input.email.html for more details.