C# SMTP and format email validator
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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:
EmailValidatoremailValidator=newEmailValidator();EmailValidationResultresult;if(!emailValidator.Validate(email,outresult)){Console.WriteLine("Unable to check email")// no internet connection or mailserver is down / busy}switch(result){caseEmailValidationResult.OK:
Console.WriteLine("Mailbox exists");break;caseEmailValidationResult.MailboxUnavailable:
Console.WriteLine("Email server replied there is no such mailbox");break;caseEmailValidationResult.MailboxStorageExceeded:
Console.WriteLine("Mailbox overflow");break;caseEmailValidationResult.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