sevomin/Sevomin.Models/Helpers/EmailValidationAttribute.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Sevomin.Models.Helpers
{
    using System.ComponentModel.DataAnnotations;

    public class EmailValidationAttribute : RegularExpressionAttribute
    {
        public EmailValidationAttribute()
            : base(@"^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-zA-Z0-9]{1}[a-zA-Z0-9\-]{0,62}[a-zA-Z0-9]{1})|[a-zA-Z])\.)+[a-zA-Z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$")
        {

        }
    }
}