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.NET Email Validation Library

SDK Modules

Node.js Module Ruby Module PHP Module Perl Module Python Module Java Class .Net Library Go Package Rust Package

Overview

This .NET library provides an easy way to call the MailboxValidator Email Validation API which validates if an email address is a valid one.

NOTE: An API key will be given to you when you signup for any of our API plans. This library will require that API key to function.

NuGet:
https://www.nuget.org/packages/MailboxValidator.SingleValidation/
GitHub Repository (VB.NET):
https://github.com/MailboxValidator/mailboxvalidator-vbnet
GitHub Repository (C#):
https://github.com/MailboxValidator/mailboxvalidator-csharp

Installation via NuGet Package Manager

Install-Package MailboxValidator.SingleValidation

Sample Codes

To validate an email address 
Imports System.Text
Imports Microsoft.VisualStudio.TestTools.UnitTesting

 Public Class TestMailboxValidatorVB

     Public Sub TestMethod1()
        Dim mbv = New MailboxValidator.SingleValidation("PASTE_YOUR_API_KEY_HERE")
        Dim results As String = ""
        Try
            Dim rec = mbv.ValidateEmail("example@example.com")

            If rec.ErrorCode = "" Then
                results += "email_address: " & rec.EmailAddress & vbCrLf
                results += "domain: " & rec.Domain & vbCrLf
                results += "is_free: " & rec.IsFree & vbCrLf
                results += "is_syntax: " & rec.IsSyntax & vbCrLf
                results += "is_domain: " & rec.IsDomain & vbCrLf
                results += "is_smtp: " & rec.IsSMTP & vbCrLf
                results += "is_verified: " & rec.IsVerified & vbCrLf
                results += "is_server_down: " & rec.IsServerDown & vbCrLf
                results += "is_greylisted: " & rec.IsGreylisted & vbCrLf
                results += "is_disposable: " & rec.IsDisposable & vbCrLf
                results += "is_suppressed: " & rec.IsSuppressed & vbCrLf
                results += "is_role: " & rec.IsRole & vbCrLf
                results += "is_high_risk: " & rec.IsHighRisk & vbCrLf
                results += "is_catchall: " & rec.IsCatchall & vbCrLf
                results += "mailboxvalidator_score: " & rec.MailboxValidatorScore & vbCrLf
                results += "time_taken: " & rec.TimeTaken & vbCrLf
                results += "status: " & rec.Status & vbCrLf
                results += "credits_available: " & rec.CreditsAvailable & vbCrLf
            Else
                results += "error_code: " & rec.ErrorCode & vbCrLf
                results += "error_message: " & rec.ErrorMessage & vbCrLf
            End If

            results += "version: " & rec.Version & vbCrLf
            MsgBox(results)
        Catch ex As Exception
            MsgBox(ex.Message & vbCrLf & ex.StackTrace)
        End Try
    End Sub

End Class

To check if an email is from a disposable email provider 
Imports System.Text
Imports Microsoft.VisualStudio.TestTools.UnitTesting

 Public Class TestMailboxValidatorVB

     Public Sub TestMethod1()
        Dim mbv = New MailboxValidator.SingleValidation("PASTE_YOUR_API_KEY_HERE")
        Dim results As String = ""
        Try
            Dim rec = mbv.DisposableEmail("example@example.com")

            If rec.ErrorCode = "" Then
                results += "email_address: " & rec.EmailAddress & vbCrLf
                results += "is_disposable: " & rec.IsDisposable & vbCrLf
                results += "credits_available: " & rec.CreditsAvailable & vbCrLf
            Else
                results += "error_code: " & rec.ErrorCode & vbCrLf
                results += "error_message: " & rec.ErrorMessage & vbCrLf
            End If

            results += "version: " & rec.Version & vbCrLf
            MsgBox(results)
        Catch ex As Exception
            MsgBox(ex.Message & vbCrLf & ex.StackTrace)
        End Try
    End Sub

End Class

To check if an email is from a free email provider 
Imports System.Text
Imports Microsoft.VisualStudio.TestTools.UnitTesting

 Public Class TestMailboxValidatorVB

     Public Sub TestMethod1()
        Dim mbv = New MailboxValidator.SingleValidation("PASTE_YOUR_API_KEY_HERE")
        Dim results As String = ""
        Try
            Dim rec = mbv.FreeEmail("example@example.com")

            If rec.ErrorCode = "" Then
                results += "email_address: " & rec.EmailAddress & vbCrLf
                results += "is_free: " & rec.IsFree & vbCrLf
                results += "credits_available: " & rec.CreditsAvailable & vbCrLf
            Else
                results += "error_code: " & rec.ErrorCode & vbCrLf
                results += "error_message: " & rec.ErrorMessage & vbCrLf
            End If

            results += "version: " & rec.Version & vbCrLf
            MsgBox(results)
        Catch ex As Exception
            MsgBox(ex.Message & vbCrLf & ex.StackTrace)
        End Try
    End Sub

End Class
To validate an email address 
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Windows.Forms;
using MailboxValidator;

namespace TestMailboxValidatorCSharp
{
    [TestClass]
    public class TestMailboxValidatorCSharp
    {
        [TestMethod]
        public void TestMethod1()
        {
            var mbv = new SingleValidation("PASTE_YOUR_API_KEY_HERE");
            String results = "";
            try
            {
                MBVResult rec = mbv.ValidateEmail("example@example.com");

                if (rec.ErrorCode == "")
                {
                    results += "email_address: " + rec.EmailAddress + "\n";
                    results += "domain: " + rec.Domain + "\n";
                    results += "is_free: " + rec.IsFree + "\n";
                    results += "is_syntax: " + rec.IsSyntax + "\n";
                    results += "is_domain: " + rec.IsDomain + "\n";
                    results += "is_smtp: " + rec.IsSMTP + "\n";
                    results += "is_verified: " + rec.IsVerified + "\n";
                    results += "is_server_down: " + rec.IsServerDown + "\n";
                    results += "is_greylisted: " + rec.IsGreylisted + "\n";
                    results += "is_disposable: " + rec.IsDisposable + "\n";
                    results += "is_suppressed: " + rec.IsSuppressed + "\n";
                    results += "is_role: " + rec.IsRole + "\n";
                    results += "is_high_risk: " + rec.IsHighRisk + "\n";
                    results += "is_catchall: " + rec.IsCatchall + "\n";
                    results += "mailboxvalidator_score: " + rec.MailboxValidatorScore + "\n";
                    results += "time_taken: " + rec.TimeTaken + "\n";
                    results += "status: " + rec.Status + "\n";
                    results += "credits_available: " + rec.CreditsAvailable + "\n";
                }
                else
                {
                    results += "error_code: " + rec.ErrorCode + "\n";
                    results += "error_message: " + rec.ErrorMessage + "\n";
                }

                results += "version: " + rec.Version + "\n";
                MessageBox.Show(results);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + "\n" + ex.StackTrace);
            }
        }
    }
}

To check if an email is from a disposable email provider 
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Windows.Forms;
using MailboxValidator;

namespace TestMailboxValidatorCSharp
{
    [TestClass]
    public class TestMailboxValidatorCSharp
    {
        [TestMethod]
        public void TestMethod1()
        {
            var mbv = new SingleValidation("PASTE_YOUR_API_KEY_HERE");
            String results = "";
            try
            {
                MBVResult rec = mbv.DisposableEmail("example@example.com");

                if (rec.ErrorCode == "")
                {
                    results += "email_address: " + rec.EmailAddress + "\n";
                    results += "is_disposable: " + rec.IsDisposable + "\n";
                    results += "credits_available: " + rec.CreditsAvailable + "\n";
                }
                else
                {
                    results += "error_code: " + rec.ErrorCode + "\n";
                    results += "error_message: " + rec.ErrorMessage + "\n";
                }

                results += "version: " + rec.Version + "\n";
                MessageBox.Show(results);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + "\n" + ex.StackTrace);
            }
        }
    }
}

To check if an email is from a free email provider 
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Windows.Forms;
using MailboxValidator;

namespace TestMailboxValidatorCSharp
{
    [TestClass]
    public class TestMailboxValidatorCSharp
    {
        [TestMethod]
        public void TestMethod1()
        {
            var mbv = new SingleValidation("PASTE_YOUR_API_KEY_HERE");
            String results = "";
            try
            {
                MBVResult rec = mbv.FreeEmail("example@example.com");

                if (rec.ErrorCode == "")
                {
                    results += "email_address: " + rec.EmailAddress + "\n";
                    results += "is_free: " + rec.IsFree + "\n";
                    results += "credits_available: " + rec.CreditsAvailable + "\n";
                }
                else
                {
                    results += "error_code: " + rec.ErrorCode + "\n";
                    results += "error_message: " + rec.ErrorMessage + "\n";
                }

                results += "version: " + rec.Version + "\n";
                MessageBox.Show(results);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + "\n" + ex.StackTrace);
            }
        }
    }
}

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