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      Email validation library, featuring full IETF-compliant syntax validation, DNS checking, mailbox existence test and tools for advanced batch processing.
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      Email validation library with Data Annotations support, featuring advanced syntax verification, ISP-specific syntax checks and disposable email address handling.

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      A cool and free Visual Studio extension which allows to easily browse, define, match and filter ASP.NET MVC routes within ASP.NET applications and web sites.

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    • Routing Assistant reached version 1.7
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EmailVerify for .NET

Advanced email validation component for Microsoft .NET

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Catch-all domain test

With the term catch-all, we mean a mailbox on a domain that will receive all of the email messages addressed to that domain, even if their addresses do not exist in the mail server. EmailVerify for .NET detects catch-all domains automatically and gives back a specific status code that signal the presence of such a domain; while catch-all domains actually accept every possible local part, you will usually don't want to consider addresses that pertain to them as a failure but, rather, you may possibly want to flag them in your database. Under the CatchAll validation level, however, the presence of these addresses yields to a specific kind of failure, as shown in the code below.

            var engine = new VerificationEngine();

            // ...

            var result = engine.Run("bob@example.com",
                VerificationLevel.CatchAll).Result;

            switch (result.LastStatus)
            {
                case VerificationStatus.Success:
                    // The mailbox exists and the server is not a catch-all
                    break;

                case VerificationStatus.ServerIsCatchAll:
                    // The server acts as a catch-all for the requested domain
                    break;

                case VerificationStatus.CatchAllConnectionFailure:
                    // A network failure happened while performing the catch-all
                    // test
                    break;
                    
                case VerificationStatus.CatchAllValidationTimeout:
                    // A timeout occured while performing the catch-all test on
                    // the server; we need to increase the related settings value
                    break;

                // TODO: Add more cases, if needed

                default:
                    // ...
                    break;
            }
        

Features at a glance


  • Advanced syntax validation
    • Quoted strings and quoted pairs
    • Email address internationalization
    • Comments
    • Domain literals
  • Disposable email addresses (DEA) detection
  • Mailbox existence check
  • Catch-all domain test
  • Greylisting support
  • Yahoo! mailbox validation
  • Detailed email validation results
    • Syntax-related failures
    • DNS-related failures
    • Well-known disposable email address failures
    • SMTP failures
    • Mailbox validation failures
    • Catch-all rejection failures
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