Validação de e-mail com expressão regular que funciona 99,99%

Basta copiar e colar o regex e-mail abaixo para o idioma de sua escolha. Observe que não há nenhum regex e-mail perfeito, daí os 99,99%.

Regex E-mail Geral (RFC 5322 Padrão oficial)

Código:

(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])

Python

Código:

r"(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)"

Javascript

Código:

/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/

HTML5

Código:

<input type="email" placeholder="Enter your email" />

No caso de você se perguntar, abaixo está o regex usado em type = "email" do W3C:

Código:

/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/

Swift (Somente Regex)

Código:

[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}

Swift (Regex usado em uma função)

Código:

let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
 return NSPredicate(format: "SELF MATCHES %@", emailRegex).evaluateWithObject(candidate)
}

PHP

Código:

/^(?!(?:(?:\x22?\x5C[\x00-\x7E]\x22?)|(?:\x22?[^\x5C\x22]\x22?)){255,})(?!(?:(?:\x22?\x5C[\x00-\x7E]\x22?)|(?:\x22?[^\x5C\x22]\x22?)){65,}@)(?:(?:[\x21\x23-\x27\x2A\x2B\x2D\x2F-\x39\x3D\x3F\x5E-\x7E]+)|(?:\x22(?:[\x01-\x08\x0B\x0C\x0E-\x1F\x21\x23-\x5B\x5D-\x7F]|(?:\x5C[\x00-\x7F]))*\x22))(?:\.(?:(?:[\x21\x23-\x27\x2A\x2B\x2D\x2F-\x39\x3D\x3F\x5E-\x7E]+)|(?:\x22(?:[\x01-\x08\x0B\x0C\x0E-\x1F\x21\x23-\x5B\x5D-\x7F]|(?:\x5C[\x00-\x7F]))*\x22)))*@(?:(?:(?!.*[^.]{64,})(?:(?:(?:xn--)?[a-z0-9]+(?:-[a-z0-9]+)*\.){1,126}){1,}(?:(?:[a-z][a-z0-9]*)|(?:(?:xn--)[a-z0-9]+))(?:-[a-z0-9]+)*)|(?:\[(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){7})|(?:(?!(?:.*[a-f0-9][:\]]){7,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?)))|(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){5}:)|(?:(?!(?:.*[a-f0-9]:){5,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3}:)?)))?(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))(?:\.(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))){3}))\]))$/iD

Perl / Ruby

Código:

(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]
 )+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:
 \r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(
 ?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[
 \t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\0
 31]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\
 ](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+
 (?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:
 (?:\r\n)?[ \t])*))*|(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z
 |(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)
 ?[ \t])*)*\<(?:(?:\r\n)?[ \t])*(?:@(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\
 r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[
 \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)
 ?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t]
 )*))*(?:,@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[
 \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*
 )(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]
 )+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*)
 *:(?:(?:\r\n)?[ \t])*)?(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+
 |\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r
 \n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:
 \r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t
 ]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031
 ]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](
 ?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?
 :(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?
 :\r\n)?[ \t])*))*\>(?:(?:\r\n)?[ \t])*)|(?:[^()<>@,;:".\[\] \000-\031]+(?:(?
 :(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?
 [ \t]))*"(?:(?:\r\n)?[ \t])*)*:(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:".\[\]
 \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|
 \\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>
 @,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"
 (?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t]
 )*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
 ".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?
 :[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[
 \]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*|(?:[^()<>@,;:".\[\] \000-
 \031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(
 ?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)*\<(?:(?:\r\n)?[ \t])*(?:@(?:[^()<>@,;
 :".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([
 ^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:"
 .\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\
 ]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*(?:,@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\
 [\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\
 r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\]
 \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]
 |\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ \t])*)?(?:[^()<>@,;:".\[\] \0
 00-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\
 .|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,
 ;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]]))|"(?
 :[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*
 (?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".
 \[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[
 ^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\]
 ]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:(?:\r\n)?[ \t])*)(?:,\s*(
 ?:(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
 ".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(
 ?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[
 \["()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t
 ])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t
 ])+|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?
 :\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|
 \Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*|(?:
 [^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".\[\
 ]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)*\<(?:(?:\r\n)
 ?[ \t])*(?:@(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["
 ()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)
 ?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>
 @,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*(?:,@(?:(?:\r\n)?[
 \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,
 ;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t]
 )*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
 ".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ \t])*)?
 (?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:".
 \[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:
 \r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\[
 "()<>@,;:".\[\]]))|"(?:[^"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])
 *))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])
 +|\Z|(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\
 .(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z
 |(?=[\["()<>@,;:".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:(
 ?:\r\n)?[ \t])*))*)?;\s*)

Perl 5.10 ou mais recente

Código:

/(?(DEFINE)(?<address>(?&mailbox) | (?&group)) (? (?&name_addr) | (?&addr_spec)) (? (?&display_name)? (?&angle_addr)) (? (?&CFWS)? < (?&addr_spec) > (?&CFWS)?) (? (?&display_name) : (?:(?&mailbox_list) | (?&CFWS))? ; (?&CFWS)?) (? (?&phrase)) (? (?&mailbox) (?: , (?&mailbox))*) (? (?&local_part) \@ (?&domain)) (? (?&dot_atom) | (?&quoted_string)) (? (?&dot_atom) | (?&domain_literal)) (? (?&CFWS)? \[ (?: (?&FWS)? (?&dcontent))* (?&FWS)? \] (?&CFWS)?) (? (?&dtext) | (?&quoted_pair)) (? (?&NO_WS_CTL) | [\x21-\x5a\x5e-\x7e]) (? (?&ALPHA) | (?&DIGIT) | [!#\$%&'*+-/=?^_`{|}~]) (? (?&CFWS)? (?&atext)+ (?&CFWS)?) (? (?&CFWS)? (?&dot_atom_text) (?&CFWS)?) (? (?&atext)+ (?: \. (?&atext)+)*) (? [\x01-\x09\x0b\x0c\x0e-\x7f]) (? \\ (?&text)) (? (?&NO_WS_CTL) | [\x21\x23-\x5b\x5d-\x7e]) (? (?&qtext) | (?&quoted_pair)) (? (?&CFWS)? (?&DQUOTE) (?:(?&FWS)? (?&qcontent))* (?&FWS)? (?&DQUOTE) (?&CFWS)?) (? (?&atom) | (?&quoted_string)) (? (?&word)+) # Folding white space (? (?: (?&WSP)* (?&CRLF))? (?&WSP)+) (? (?&NO_WS_CTL) | [\x21-\x27\x2a-\x5b\x5d-\x7e]) (? (?&ctext) | (?&quoted_pair) | (?&comment)) (? \( (?: (?&FWS)? (?&ccontent))* (?&FWS)? \) ) (? (?: (?&FWS)? (?&comment))* (?: (?:(?&FWS)? (?&comment)) | (?&FWS))) # No whitespace control (? [\x01-\x08\x0b\x0c\x0e-\x1f\x7f]) (? [A-Za-z]) (? [0-9]) (? \x0d \x0a) (? ") (? [\x20\x09]) ) (?&address)/x</address>

Java

Código:

(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])

Ruby (versão simples)

Código:

/\A([\w+\-].?)+@[a-z\d\-]+(\.[a-z]+)*\.[a-z]+\z/i

.NET (correspondência padrão geral)

Código:

^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$

C#

Código:

^(?(")(".+?(?<!\\)"@)|(([0-9a-z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-z][-\w]*[0-9a-z]*\.)+[a-z0-9][\-a-z0-9]{0,22}[a-z0-9]))$

Outra maneira é usar a classe System.Net.Mail.MailAddress. Para determinar se um endereço de e-mail é válido, passe o endereço de e-mail para o construtor de classe MailAddress.MailAddress(String).

VB.NET

Código:

Function isEmail(ByVal email as string) as boolean
    Static emailRegex As New Regex("^[_a-z0-9-]+(.[a-z0-9-]+)@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,4})$")

    return emailRegex.IsMatch(email)
End Function

Localizar todos os endereços de email em um arquivo usando Grep

Código:

$ grep -E -o "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" filename.txt

Validação de e-mail do SQL Server

Código:

select email
 from table_name where
 patindex ('%[ &'',":;!+=\/()<>]%', email) > 0 -- Invalid characters
 or patindex ('[@.-_]%', email) > 0 -- Valid but cannot be starting character
 or patindex ('%[@.-_]', email) > 0 -- Valid but cannot be ending character
 or email not like '%@%.%' -- Must contain at least one @ and one .
 or email like '%..%' -- Cannot have two periods in a row
 or email like '%@%@%' -- Cannot have two @ anywhere
 or email like '%.@%' or email like '%@.%' -- Cannot have @ and . next to each other
 or email like '%.cm' or email like '%.co' -- Camaroon or Colombia? Typos.
 or email like '%.or' or email like '%.ne' -- Missing last letter

Oracle PL/SQL Email Regex

Código:

SELECT email
FROM table_name
WHERE REGEXP_LIKE (email, '[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}');

MySQL

Código:

SELECT * FROM `users` WHERE `email` NOT REGEXP '^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$';

Autor: emailregex

GooD