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IMAP and POP3 Clients in C#

, 28 Sep 2012 CPOL
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IMAP & POP3 Clients C#. A library for intuitive ease of use of these two protocols.


Searching on the web I was never able to find a library simple and effective way to manage email client with IMAP or POP3 without having to create a good wrapper.

So I decided to make available to the wrapper that is currently used to handle these two protocols. 


This library is a library wrapper of free Limisoft library (attached in the download). Lumisoft web site

This library allows you to create a client or IMAP or POP3 is 100% compatible with servers such as:

  • Gmail
  • Windows Live

Servers Libero, AOL, Exchange, Yahoo, etc.. are still in testing and not sure the 100% working. The POP3 protocol is implemented based on RFC 1939 Link .

The IMAP protocol is implemented based on the standard Internet Message Access Protocol - Version 4 rev1 Link .

Using the code

This simple library to be able to create basic client using the two protocols used in the web: IMAP and POP3

The library exposes two interfaces: IMailClient and IMail.

public interface IEmail 

public interface IEmailClient 

IEmail is an instance of an email message on server. IEmailClient is an instance of a POP3 or IMAP client.

To construct an instance of a client to be used the factory "EmailClientFactory" passing the method "GetClient" the type of protocol you want to use

public static class EmailClientFactory
    public static IEmailClient GetClient(EmailClientEnum type)
        if (type == EmailClientEnum.IMAP) return new IMAP_Wrapper();
        if (type == EmailClientEnum.POP3) return new POP3_Wrapper();
        return null;

The interface IMailClient allows to manage the clients in the same way.

public interface IEmailClient
    event EmailClient_OnMessagesLoaded OnMessagesLoaded;
    bool IsConnected
    List<IEmail> Messages
    void Connect(String server, String User, String pass, int port, bool useSSl);
    void Disconnect();
    void SetCurrentFolder(String folder);
    int GetMessagesCount();
    void LoadMessages();
    void LoadMessages(String start, String end);
    void LoadRecentMessages(Int32 lastSequenceNumber);

Using the library

IEmailClient ImapClient = EmailClientFactory.GetClient(EmailClientEnum.IMAP); 
ImapClient.Connect("", "", "examplePass", 993, true);    
// I assume that 5 is the last "ID" readed by my client. 
// If I want to read all messages i use "ImapClient.LoadMessages();"
// To read all my messages loaded:
for (int i = 0; i < ImapClient.Messages.Count; i++)
    IEmail msm = (IEmail)ImapClient.Messages[i];
    // Load all infos include attachments
    Console.Writeline(msm.Date.ToString() + " - " + msm.From[0] + " - " + 
                      msm.Subject + " - " + msm.Attachments.Count);


27/09/2012 : First version


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

GeneralMy vote of 3 PinprofessionalAfzaal Ahmad Zeeshan20-Aug-14 10:57 
QuestionRich Text / HTML PinmemberJeff Dressing10-May-14 6:23 
QuestionLineSizeExceededException Pinmembersteinster5-Mar-14 3:23 
AnswerRe: LineSizeExceededException PinmemberD.Net Solutions27-Mar-14 7:49 
GeneralRe: LineSizeExceededException Pinmembersteinster2-May-14 10:42 
Questionthere is an Error Pinmemberheemanshubhalla10-Feb-14 3:52 
Questionplease give instructions to operate Pinmemberheemanshubhalla10-Feb-14 2:04 
QuestionCan't use - "Does not exist in the current context"? Pinmembergajit13-Nov-13 5:05 
QuestionIMAP attachements from wrong emails Pinmemberjaboostinky6-Oct-13 15:51 
QuestionStato Messaggio PinmemberZ@clarco4-Sep-13 4:44 
AnswerRe: Stato Messaggio PinmemberD.Net Solutions21-Nov-13 3:45 
GeneralMy vote of 4 PinmemberSgtPooki7-Jun-13 6:21 
QuestionHTML PinmemberJimboStink17-Apr-13 16:30 
QuestionEmail not read in message inbox PinmemberWilhelm Meier18-Dec-12 9:01 
Questionnot read emails PinmemberWilhelm Meier18-Dec-12 3:14 
AnswerRe: not read emails PinmemberD.Net Solutions18-Dec-12 4:57 
GeneralRe: not read emails PinmemberWilhelm Meier18-Dec-12 6:38 
GeneralRe: not read emails PinmemberWilhelm Meier18-Dec-12 6:41 
GeneralRe: not read emails PinmemberD.Net Solutions18-Dec-12 22:17 
GeneralRe: not read emails PinmemberWilhelm Meier19-Dec-12 3:21 
Questioncan you provide some guide line PinmemberSusheelbn15-Dec-12 1:17 
AnswerRe: can you provide some guide line PinmemberD.Net Solutions17-Dec-12 3:14 
QuestionDelete email PinmemberBitteron13-Dec-12 22:31 
AnswerRe: Delete email PinmemberD.Net Solutions14-Dec-12 0:40 
QuestionRe: Delete email Pinmemberlevelboy11-Jul-13 2:56 
AnswerRe: Delete email PinmemberMember 1103443315-Oct-14 1:26 
QuestionI am a newbie here and need help with this PinmemberGPS Waraich13-Dec-12 3:50 
AnswerRe: I am a newbie here and need help with this PinmemberD.Net Solutions14-Dec-12 0:42 
GeneralMy vote of 4 Pinmembermansoor.siddique14-Nov-12 5:49 
GeneralAttachments Pinmemberantonio_l4-Oct-12 4:07 
GeneralRe: Attachments PinmemberD.Net Solutions4-Oct-12 22:19 
GeneralRe: Attachments Pinmemberantonio_l5-Oct-12 1:38 
QuestionProblem using this library PinmemberMember 392317128-Sep-12 3:58 
AnswerRe: Problem using this library PinmemberD.Net Solution28-Sep-12 4:04 
GeneralRe: Problem using this library PinmemberMember 392317128-Sep-12 4:17 
Thanks!! Now Work.

Do you have tested it with PEC? (I'm Italian too)
GeneralRe: Problem using this library PinmemberD.Net Solution28-Sep-12 4:20 
GeneralRe: Problem using this library PinmemberMember 775724528-Sep-12 9:43 
GeneralRe: Problem using this library PinmemberD.Net Solutions2-Oct-12 1:38 
GeneralRe: Problem using this library PinmemberMember 77572452-Oct-12 10:20 
QuestionQuery regarding using this Code Pinmemberhirenel28-Sep-12 2:00 
AnswerRe: Query regarding using this Code PinmemberD.Net Solution28-Sep-12 3:10 
QuestionGreat stuff PinmemberSorenDalby28-Sep-12 0:33 
AnswerRe: Great stuff PinmemberD.Net Solution28-Sep-12 0:43 
GeneralRe: Great stuff PinmemberMember 775724528-Sep-12 9:44 
GeneralRe: Great stuff PinmemberD.Net Solutions2-Oct-12 1:42 
GeneralRe: Great stuff PinmemberMember 77572452-Oct-12 10:20 

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