Ruby email check (RFC 2822)

Question

Does anyone know what the regular expression in Ruby is to verify an email address is in proper RFC 2822 email format?

What I want to do is:

string.match(RFC_2822_REGEX)

where "RFC_2822_REGEX" is the regular expression to verify if my string is in valid RFC 2882 form.

possible duplicate of [How to use a regular expression to validate an email addresses?](http://stackoverflow.com/questions/201323/how-to-use-a-regular-expression-to-validate-an-email-addresses) — Marc-André Lafortune, May 17 '12 at 15:22

score 12 · Answer 1 · edited Aug 31 '12 at 11:55

12

You can use the mail gem to parse any string according to RFC2822 like so:

def valid_email( value )
  begin
   return false if value == ''
   parsed = Mail::Address.new( value )
   return parsed.address == value && parsed.local != parsed.address
  rescue Mail::Field::ParseError
    return false
  end
end

This checks if the email is provided, i.e. returns false for an empty address and also checks that the address contains a domain.

edited Aug 31 '12 at 11:55

Intrepidd

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answered Feb 07 '12 at 20:02

Wolfgang

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This doesn't parse valid emails listed in RFC3696, including "Abc\@def@example.com". :( – indirect Nov 18 '13 at 21:04

score 2 · Answer 2 · answered Feb 11 '09 at 06:37

http://theshed.hezmatt.org/email-address-validator

Does regex validation based on RFC2822 rules (it's a monster of a regex, too), it can also check that the domain is valid in DNS (has MX or A records), and do a test delivery to validate that the MX for the domain will accept a message for the address given. These last two checks are optional.

score 1 · Answer 3 · answered Feb 11 '09 at 06:13

1

Try this:

answered Feb 11 '09 at 06:13

Lonzo

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this REGEX allows for emails like "test@example/x.com" and therefor "test@example/////////////////////////////////x.com" – Jakob Cosoroaba Apr 01 '10 at 17:34

Ruby email check (RFC 2822)

3 Answers3

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