Regular expression for email

Question

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What is the best regular expression for validating email addresses?

I am using this particular regular expression for checking emails.

"^[A-Za-z0-9](([a-zA-Z0-9,=\.!\-#|\$%\^&\*\+/\?_`\{\}~]+)*)@(?:[0-9a-zA-Z-]+\.)+[a-zA-Z]{2,9}$"

The issue I have is that, this allows periods before the "@" symbol. Is there any way this expression be modified so that this does not happen, yet all other conditions are maintained.

[email protected] should be invalid

Thanks in advance -Rollin

Answer 1

you could put [^\.] before the @ so that it will allow any character except the dot

of course this is probably not what you want, so you could just put a [] with any legal characters in it

just in case someone has a email name (i mean the part before the @) that is just 1 character, you might need to get creative with the |