Email address regex

Hi Guys,

I have this regex for my email address :
^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$

My question does it allow :
- dot (.) character?
- underscore (_) character?
- minus (-) character?
softblessAsked:
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NeuropsykopatCommented:
My question does it allow :
- dot (.) character? YES
- underscore (_) character? YES
- minus (-) character? YES
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ozoCommented:
but it does not allow
fred&barney@stonehenge.com
which is a valid and active email address
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aliganjeiCommented:
It does allow all three characters you are looking for; as Neuropsykopat mentioned.
To describe it, we can say it matches any string that starts with at least one alphanumeric/underscore/minus character; after that there can be zero or more alphanumeric/underscore/minus/dot character(s) then there must exists an at sign and further things related to domain address

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point_pleasantCommented:
take a look at

http://www.regular-expressions.info/email.html

rfc5322

also states

The local-part of the email address may use any of these ASCII characters:

    * Uppercase and lowercase English letters (a–z, A–Z)
    * Digits 0 to 9
    * Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~
    * Character . (dot, period, full stop) provided that it is not the first or last character, and provided also that it does not appear two or more times consecutively (e.g. John..Doe@example.com).
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softblessAuthor Commented:
thanks
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