EmailVerify for Silverlight

The term disposable email addresses (DEA) refers to the (almost always) temporarily email addresses generated by some free services on the Internet to overcome the need of giving away a real email address, with the aim of fighting email abuse and spamming. More often than not, however, these addresses are used in place of the real ones by malicious users, in the attempt of fooling user registration systems and with great damage for the marketing efforts that may have taken place.

EmailVerify for Silverlight detects more than 2,000 disposable email address providers automatically, including:

• Mailinator
• 10MinuteMail
• GuerrillaMail
• TempInbox
• MailEater
• TrashMail

By default, the component aborts the validation process as soon as it finds one of such temporary addresses:

            var engine = new VerificationEngine();

            // Check a known disposable address

            var result = engine.Run("badmail@mailinator.com",
                VerificationLevel.Mailbox).Result;
            
            switch (result.LastStatus)
            {
                case VerificationStatus.DomainIsWellKnownDea:
                    // Well-known disposable email address provider
                    break;

                case VerificationStatus.MailExchangerIsWellKnownDea:
                    // Well-known disposable email address provider host
                    break;

                case VerificationStatus.MailboxIsDea:
                    // Disposable mailbox, from a regular email provider
                    break;
            }
        

Should you need to check if a given email address exists even if it is disposable, you may easily relax this rule so that it will never abort the validation process; in this case, a property of the result will tell if the address is temporary/disposable or not:

            var engine = new VerificationEngine();

            // Avoid aborting on disposable email address failures

            engine.DefaultSettings.TreatDeaFailuresAsFatal = false;

            // Check a known disposable address

            var result = engine.Run("badmail@mailinator.com",
                VerificationLevel.Mailbox).Result;
            
            if (result.IsDisposableEmailAddress == true)
            {
                // In this case, the validation process continued even after the
                // disposable email address has been detected...
            }