EmailValidator.NET

C# SMTP and format email validator

Every single star makes maintainer happy! ⭐

NuGet:

Install-Package EmailValidator.NET

Note, that there is no broadly suppord way to check email existance, so this validator should be used for reference only. Works with:

• gmail.com
• yandex.ru

Example:

EmailValidator emailValidator = new EmailValidator();
EmailValidationResult result;

if (!emailValidator.Validate(email, out result))
{
    Console.WriteLine("Unable to check email") // no internet connection or mailserver is down / busy
}

switch (result)
{
    case EmailValidationResult.OK:
        Console.WriteLine("Mailbox exists");
        break;

    case EmailValidationResult.MailboxUnavailable:
        Console.WriteLine("Email server replied there is no such mailbox");
        break;

    case EmailValidationResult.MailboxStorageExceeded:
        Console.WriteLine("Mailbox overflow");
        break;

    case EmailValidationResult.NoMailForDomain:
        Console.WriteLine("Emails are not configured for domain (no MX records)");
        break;
}

Drawbacks:

• some SMTP servers always reply email is good, however when you send email, it turns out it is not
• some SMTP servers reply in a specific manner, delaing replies, so it seems like email is not exists