public class Smime

Public Class Smime

// To use the code below, import these namespaces at the top of your code
using System;
using MailBee;
using MailBee.Pop3Mail;
using MailBee.Mime;
using MailBee.Security;

Smime objSmime = new Smime();
Pop3 pop = new Pop3();
pop.Connect("server", 110, true);
pop.Login("login", "password");
MailMessage msg = pop.DownloadEntireMessage(pop.InboxMessageCount);
pop.Disconnect();

try
{
    if (msg.IsEncrypted)
    {
        SmimeResult smResult = objSmime.DecryptAndVerify(msg, MessageVerificationFlags.All);
        if (smResult.VerificationResult > 0)
        {
            Console.WriteLine("Verification failed");
        }
        else if (smResult.DecryptedMessage != null)
        {
            Console.WriteLine(smResult.DecryptedMessage.BodyPlainText);
        }
    }
}
catch (MailBeeException ex)
{
    Console.WriteLine(ex.Message);
}

' To use the code below, import these namespaces at the top of your code.
Imports MailBee
Imports MailBee.Pop3Mail
Imports MailBee.Mime
Imports MailBee.Security

Dim objSmime As Smime = New Smime
Dim pop As Pop3 = New Pop3
pop.Connect("server", 110, True)
pop.Login("login", "password")
Dim msg As MailMessage = pop.DownloadEntireMessage(pop.InboxMessageCount)
pop.Disconnect()

Try
    If (msg.IsEncrypted) Then
        Dim smResult As SmimeResult = objSmime.DecryptAndVerify(msg, MessageVerificationFlags.All)
        If (smResult.VerificationResult > 0) Then
            Console.WriteLine("Verification failed")
        ElseIf (Not IsNothing(smResult.DecryptedMessage)) Then
            Console.WriteLine(smResult.DecryptedMessage.BodyPlainText)
        End If
    End If
Catch ex As MailBeeException
    Console.WriteLine(ex.Message)
End Try