Pop3Client pop = new Pop3Client();

pop.Host = "outlook.office365.com";
pop.Username = "LeonDavisLD@outlook.com";
pop.Password = "password";
pop.Port = 995;
pop.EnableSsl = true;

pop.Connect();

//Get the number of messages
Console.WriteLine("Mailbox message count: " + pop.GetMessageCount());
            
//Get the size of mailbox
Console.WriteLine("Mailbox size: " + pop.GetSize() + " bytes");

//Get the unique id of the first message
Console.WriteLine("Message uid: " + pop.GetMessagesUid(1));

using System;
using Spire.Email.Pop3;

namespace Get_mailbox_information
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a pop3 client
            using (Pop3Client pop = new Pop3Client())
            {
                //Set host, authentication, port and connection protocol
                pop.Host = "outlook.office365.com";
                pop.Username = "LeonDavisLD@outlook.com";
                pop.Password = "password";
                pop.Port = 995;
                pop.EnableSsl = true;

                //Connect the pop server
                pop.Connect();

                //Get the number of messages
                Console.WriteLine("Mailbox message count: " + pop.GetMessageCount());

                //Get the size of mailbox
                Console.WriteLine("Mailbox size: " + pop.GetSize() + " bytes");

                //Get the unique id of the first message
                Console.WriteLine("Message uid: " + pop.GetMessagesUid(1));
            }
        }
    }
}

Imports Spire.Email.Pop3

Namespace Get_mailbox_information
	Class Program
		Private Shared Sub Main(args As String())
			'Create a pop3 client
			Using pop As New Pop3Client()
				'Set host, authentication, port and connection protocol
				pop.Host = "outlook.office365.com"
				pop.Username = "LeonDavisLD@outlook.com"
				pop.Password = "password"
				pop.Port = 995
				pop.EnableSsl = True

				'Connect the pop server
				pop.Connect()

				'Get the number of messages
				Console.WriteLine("Mailbox message count: " + pop.GetMessageCount())

				'Get the size of mailbox
				Console.WriteLine("Mailbox size: " + pop.GetSize() + " bytes")

				'Get the unique id of the first message
				Console.WriteLine("Message uid: " + pop.GetMessagesUid(1))
			End Using
		End Sub
	End Class
End Namespace

using Spire.Email;
using Spire.Email.IMap;
using System;


namespace CreateMailFolder 
{
    class Program
    {
        static void Main(string[] args)
        {
            //create an imapclient with username, password and host
            ImapClient client = new ImapClient();
            client.Username = "test@outlook.com";
            client.Password = "password";
            client.Host = "outlook.office365.com";
            //specify the port
            client.Port = 143;
            //specify the connection protocol
            client.ConnectionProtocols = ConnectionProtocols.Ssl;
            //connect to imap mail server
            client.Connect();
            //create a folder named ‘e-iceblue’
            client.CreateFolder("e-iceblue");
            Console.WriteLine("Done!");
        }
    }
}

using Spire.Email;
using Spire.Email.IMap;
using System;

namespace RenameMailFolder 
{
    class Program
    {
        static void Main(string[] args)
        {
            //create an imapclient with username, password and host
            ImapClient client = new ImapClient();
            client.Username = "test@outlook.com";
            client.Password = "password";
            client.Host = "outlook.office365.com";
            //specify the port
            client.Port = 143;
            //specify the connection protocol
            client.ConnectionProtocols = ConnectionProtocols.Ssl;
            //connect to imap mail server
            client.Connect();
            //rename an existing folder with a new name       
            client.RenameFolder("e-iceblue", "E-ICEBLUE");
            Console.WriteLine("Done!");
        }
    }

using Spire.Email;
using Spire.Email.IMap;
using System;

namespace DeleteMailFolder 
{
    class Program
    {
        static void Main(string[] args)
        {
            //create an imapclient with username, password and host
            ImapClient client = new ImapClient();
            client.Username = "test@outlook.com";
            client.Password = "password";
            client.Host = "outlook.office365.com";
            //specify the port
            client.Port = 143;
            //specify the connection protocol
            client.ConnectionProtocols = ConnectionProtocols.Ssl;
            //connect to imap mail server
            client.Connect();
            //delete an existing folder       
            client.DeleteFolder("E-ICEBLUE");
            Console.WriteLine("Done!");
        }
    }
}

using Spire.Email;
using System.IO;


namespace ExtractAttachment 
{
    class Program
    {
        static void Main(string[] args)
        {
            //Load the mail message from file
            MailMessage mail = MailMessage.Load("Test.msg");

            //Create a folder named Attachments
            if (!Directory.Exists("Attachments"))
            {
                Directory.CreateDirectory("Attachments");
            }

            foreach (Attachment attach in mail.Attachments)
            {
                //To get and save the attachment
                string filePath = string.Format("Attachments\\{0}", attach.ContentType.Name);
                if (File.Exists(filePath))
                {
                    File.Delete(filePath);
                }
                FileStream fs = File.Create(filePath);
                attach.Data.CopyTo(fs);
            }
        }
    }
}

Imports Spire.Email
Imports System.IO


Namespace ExtractAttachment
	Class Program
		Private Shared Sub Main(args As String())
			'Load the mail message from file
			Dim mail As MailMessage = MailMessage.Load("Test.msg")

			'Create a folder named Attachments
			If Not Directory.Exists("Attachments") Then
				Directory.CreateDirectory("Attachments")
			End If

			For Each attach As Attachment In mail.Attachments
				'To get and save the attachment
				Dim filePath As String = String.Format("Attachments\{0}", attach.ContentType.Name)
				If File.Exists(filePath) Then
					File.Delete(filePath)
				End If
				Dim fs As FileStream = File.Create(filePath)
				attach.Data.CopyTo(fs)
			Next
		End Sub
	End Class
End Namespace

using Spire.Email;


namespace DeleteAttachment 
{
    class Program
    {
        static void Main(string[] args)
        {
            MailMessage mail = MailMessage.Load("Test.msg");
            // Delete the attachment by index
            mail.Attachments.RemoveAt(0);
            // Delete the attachment by attachment name
            for (int i = 0; i < mail.Attachments.Count; i++)
            {
                Attachment attach = mail.Attachments[i];
                if (attach.ContentType.Name == "logo.png")
                {
                    mail.Attachments.Remove(attach);
                }
            }
            mail.Save("HasDeletedAttachment.msg", MailMessageFormat.Msg);
        }
    }
}

Imports Spire.Email


Namespace DeleteAttachment
	Class Program
		Private Shared Sub Main(args As String())
			Dim mail As MailMessage = MailMessage.Load("Test.msg")
			' Delete the attachment by index
			mail.Attachments.RemoveAt(0)
			' Delete the attachment by attachment name
			For i As Integer = 0 To mail.Attachments.Count - 1
				Dim attach As Attachment = mail.Attachments(i)
				If attach.ContentType.Name = "logo.png" Then
					mail.Attachments.Remove(attach)
				End If
			Next
			mail.Save("HasDeletedAttachment.msg", MailMessageFormat.Msg)
		End Sub
	End Class
End Namespace

using Spire.Email;
using Spire.Email.Pop3;
using System;
using System.Globalization;

namespace ReceiveAndSaveEmailByUsingPOP3client
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a POP3 client
            Pop3Client pop = new Pop3Client();
            //Set host, username, password etc. for the client
            pop.Host = "outlook.office365.com";
            pop.Username = "LeonDavisLD@outlook.com";
            pop.Password = "password";
            pop.Port = 995;
            pop.EnableSsl = true;
            //Connect the server
            pop.Connect();

            //Get the first message by its sequence number
            MailMessage message = pop.GetMessage(1);

            //Parse the message
            Console.WriteLine("------------------ HEADERS ---------------");
            Console.WriteLine("From   : " + message.From.ToString());
            Console.WriteLine("To     : " + message.To.ToString());
            Console.WriteLine("Date   : " + message.Date.ToString(CultureInfo.InvariantCulture));
            Console.WriteLine("Subject: " + message.Subject);
            Console.WriteLine("------------------- BODY -----------------");
            Console.WriteLine(message.BodyText);
            Console.WriteLine("------------------- END ------------------");

            //Save the message to disk using its subject as file name
            message.Save(message.Subject + ".eml", MailMessageFormat.Eml);

            Console.WriteLine("Message Saved.");
            Console.ReadKey();
        }
    }
}

Imports Spire.Email
Imports Spire.Email.Pop3
Imports System.Globalization

Namespace ReceiveAndSaveEmailByUsingPOP3client
	Class Program
		Private Shared Sub Main(args As String())
			'Create a POP3 client
			Dim pop As New Pop3Client()
			'Set host, username, password etc. for the client
			pop.Host = "outlook.office365.com"
			pop.Username = "LeonDavisLD@outlook.com"
			pop.Password = "password"
			pop.Port = 995
			pop.EnableSsl = True
			'Connect the server
			pop.Connect()

			'Get the first message by its sequence number
			Dim message As MailMessage = pop.GetMessage(1)

			'Parse the message
			Console.WriteLine("------------------ HEADERS ---------------")
			Console.WriteLine("From   : " + message.From.ToString())
			Console.WriteLine("To     : " + message.[To].ToString())
			Console.WriteLine("Date   : " + message.[Date].ToString(CultureInfo.InvariantCulture))
			Console.WriteLine("Subject: " + message.Subject)
			Console.WriteLine("------------------- BODY -----------------")
			Console.WriteLine(message.BodyText)
			Console.WriteLine("------------------- END ------------------")

			'Save the message to disk using its subject as file name
			message.Save(message.Subject + ".eml", MailMessageFormat.Eml)

			Console.WriteLine("Message Saved.")
			Console.ReadKey()
		End Sub
	End Class
End Namespace

using Spire.Email;
using Spire.Email.IMap;
using System;
using System.Globalization;


namespace ReceiveAndSaveEmailByUsingIMAPclient
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create an IMAP client
            ImapClient imap = new ImapClient();
            // Set host, username, password etc. for the client
            imap.Host = "outlook.office365.com";
            imap.Port = 143;
            imap.Username = "LeonDavisLD@outlook.com";
            imap.Password = "password";
            imap.ConnectionProtocols = ConnectionProtocols.Ssl;
            //Connect the server
            imap.Connect();

            //Select Inbox folder
            imap.Select("Inbox");

            //Get the first message by its sequence number
            MailMessage message = imap.GetFullMessage(1);

            //Parse the message
            Console.WriteLine("------------------ HEADERS ---------------");
            Console.WriteLine("From   : " + message.From.ToString());
            Console.WriteLine("To     : " + message.To.ToString());
            Console.WriteLine("Date   : " + message.Date.ToString(CultureInfo.InvariantCulture));
            Console.WriteLine("Subject: " + message.Subject);
            Console.WriteLine("------------------- BODY -----------------");
            Console.WriteLine(message.BodyText);
            Console.WriteLine("------------------- END ------------------");

            //Save the message to disk using its subject as file name
            message.Save(message.Subject + ".eml", MailMessageFormat.Eml);

            Console.WriteLine("Message Saved.");
            Console.ReadKey();
        }
    }
}

Imports Spire.Email
Imports Spire.Email.IMap
Imports System.Globalization


Namespace ReceiveAndSaveEmailByUsingIMAPclient
	Class Program
		Private Shared Sub Main(args As String())
			'Create an IMAP client
			Dim imap As New ImapClient()
			' Set host, username, password etc. for the client
			imap.Host = "outlook.office365.com"
			imap.Port = 143
			imap.Username = "LeonDavisLD@outlook.com"
			imap.Password = "password"
			imap.ConnectionProtocols = ConnectionProtocols.Ssl
			'Connect the server
			imap.Connect()

			'Select Inbox folder
			imap.[Select]("Inbox")

			'Get the first message by its sequence number
			Dim message As MailMessage = imap.GetFullMessage(1)

			'Parse the message
			Console.WriteLine("------------------ HEADERS ---------------")
			Console.WriteLine("From   : " + message.From.ToString())
			Console.WriteLine("To     : " + message.[To].ToString())
			Console.WriteLine("Date   : " + message.[Date].ToString(CultureInfo.InvariantCulture))
			Console.WriteLine("Subject: " + message.Subject)
			Console.WriteLine("------------------- BODY -----------------")
			Console.WriteLine(message.BodyText)
			Console.WriteLine("------------------- END ------------------")

			'Save the message to disk using its subject as file name
			message.Save(message.Subject + ".eml", MailMessageFormat.Eml)

			Console.WriteLine("Message Saved.")
			Console.ReadKey()
		End Sub
	End Class
End Namespace