A pattern for matching e-mail addresses

I recently published a better pattern for matching e-mail addresses than this one.

A regular expression pattern for use in JavaScript, PHP, or whatever language you use that supports them.

^[-a-z0-9._+]+@[-a-z0-9._]+\\.[-a-z0-9._]{2,6}$

The details

• Supports addresses with periods and plus signs (e.g. ‘tiffany.brown’ or ‘hotc0derch1ck+todolist’)
• Supports top-level British and Australian domain names such as ‘.co.uk’ and ‘.com.au’
• Supports new top-level domains including ‘.museum’ and ‘.travel’
• May need to use a case-insensitive modifier
• Should convert the string to lower case and trim whitespace from each end before comparting to the pattern.

Improvements? Questions? Share with us in the comments.

More information

• Regex.info
• Using Regular Expressions by Stephen Ramsay
• Regular Expression HOWTO by A.M. Kuchling (Python-specific, but the concepts are portable)
• Perl-compatible regular expressions
• PHP Perl-compatible regular expressions
• JavaScript Regular Expressions