Using Wildcard Masks to filter black or white email addresses

By using Wildcard mask you can quickly and easily verify bad emails and good emails according to you defined BlackList and WhiteList. To do that, you need to specify the lowest ValidationLevel.

The example below shows how to verify bad and good emails.

using System;
using ComponentPro.Net;

...

static void Main()
{
    string email = "test@adomain.com";
    string emails = "vietnt@hanoictt.com;jimmy@adomain.com";
    // Create a new instance of the EmailValidator class. 
    EmailValidator em = new EmailValidator();
    em.ValidationLevel = ValidationLevel.Lists;
    em.EmailValidated += em_EmailValidated;

    // You can use wilcards to validate email addresses 
    em.BlackList.Add("te??@*.com");
    em.BlackList.Add("*@adomain.com");
    em.WhiteList.Add("*@hanoictt.com");

    // Validate an email 
    em.Validate(email);

    // Validate a list of emails 
    em.ValidateEmails(emails);
}

static void em_EmailValidated(object sender, EmailValidatedEventArgs e)
{
    // Show result for each validated e-mail address. 
    Console.WriteLine(e.ValidatedLevel == ValidationLevel.Success ? (e.EmailAddress + " is a valid email") : (e.EmailAddress + " is an invalid email"));
}

Imports ComponentPro.Net

...

Shared Sub Main()
    Dim email As String = "test@adomain.com" 
    Dim emails As String = "vietnt@hanoictt.com;jimmy@adomain.com" 
    ' Create a new instance of the EmailValidator class. 
    Dim em As New EmailValidator()
    em.ValidationLevel = ValidationLevel.Lists
    AddHandler em.EmailValidated, AddressOf em_EmailValidated

    ' You can use wilcards to validate email addresses 
    em.BlackList.Add("te??@*.com")
    em.BlackList.Add("*@adomain.com")
    em.WhiteList.Add("*@hanoictt.com")

    ' Validate an email 
    em.Validate(email)

    ' Validate a list of emails 
    em.ValidateEmails(emails)
End Sub 
 
Private Shared Sub em_EmailValidated(ByVal sender As Object, ByVal e As EmailValidatedEventArgs)
    ' Show result for each validated e-mail address. 
    If e.ValidatedLevel = ValidationLevel.Success Then 
        Console.WriteLine(e.EmailAddress & " is a valid email")
    Else 
        Console.WriteLine(e.EmailAddress & " is an invalid email")
    End If 
End Sub