Develop Reference

Pop3 Commands for Tag was read email as Read email

I use pop 3 command for reading incoming emils from Gmail Account in C#.
and I want to tag as a was read email as a read email after each loop.
Since in each loop all emails get with RETR command.

There's no way to do this with the POP3 protocol. The POP3 protocol does not allow the client to save any sort of message state.
If you want this functionality, you'll have to use IMAP.

c# MailKit - Read receipt

Does anybody know if MailKit supports a read receipt (reply message on read)? I have not found anything on the web or on Stackoverflow.

Read receipts (i.e. automated messages being sent when a user opens a message) is not something that MailKit can do automatically, it must be implemented by the software using MailKit or by the mail server.
This feature is something that generally only groupware suites like Microsoft Exchange, Lotus Notes, and Novell Groupwise implement.
It is a feature that can be implemented by the mail server or by the mail client, but it is not a feature of any of the mail protocols and so MailKit does not implement it.
If you would like to support sending read receipts, you will need to automatically create a MimeMessage with a MessageDispositionNotification body part and send it when the user opens/reads a message in your client program.
To request a read receipt for a MimeMessage, you will need to set the Disposition-Notification-To header field like this:
message.Headers[HeaderId.DispositionNotificationTo] = "me#example.com";
If the receiving user agent supports read receipts and it is configured to send them, then you will theoretically receive one when the user reads the message.
For more information about read receipts, see rfc3798.

Sync sent mail with Sent folder

I need to sync sent mails with the sent folders of mail servers, for the users to see at future moments. I can send mails using all these 3 ways, SMTP, CDO and Microsoft Outlook Object(MOO); out of which I can only see my sent mails with MOO. Now the problem is, Not all clients are using outlook, and thus its more impractical to use this.
Out of exercise, I had also used MAPI to send mails, but that don't send HTML body. Also I looked over this topic Microsoft Sent folder, but that don't solve my problem.
So is there anyway, I can send mail with HTML body and sync the sent mail with Sent Folder. ?
Thanks.

You can do that with Extended MAPI (C++ or Delphi), but you probably mean Simple MAPI.
If you are connecting to an Exchange mailbox, EWS is another option.

how to know the different status of sended email in c#

I am Creating an application in c# . I have to know how can I know the status of the sended email.The status May be.
4. Track sent emails to determine if they were:
4.1 delivered
4.2 opened
4.3 recipient opt-out
4.4 bounced (with the reason for the bounce)
4.5 time/date sent
4.6 which links in the email were clicked (and time/date they were clicked)
4.7 IP address, if user clicked any links in the email
Should I use Any API or Dll or something else.Please help .Any Help will be Appreciated.

If you program your application to send mail through a hosted SMTP server like http://www.sendgrid.com or http://www.ultrasmtp.com, you can access the delivery status of messages that you've sent.

There is no easy way to do what you want. Actually this status can be tracked by your SMTP server itself and if you are using some third-party SMTP server like GMail or any corporate server, I 'm afraid they won't give you access to those information without using a authenticated client.
From your C# program, if the SmtpClient.Send() method returns true, you can assume the mail has been delivered to the SMTP server. If in case, the delivary fails, you should receive a mail to the outbound mail ID's inbox. If you want to make outbound mails appear in your outbox, you should configure IMAP/POP3 configurations accordingly.
There is no API or DLL available in exact form you want, as far as I know. You can try some other way like tracking a hash or embedded image in the mail-body from your server. But these are not reliable way as most mordern Messaging services have counter-measures for this.

how to create a SMTP server

I have an application that run on server,
I want that my application could received mail in order to start some function.
I would like to know what should I need to do in order to have this capability?
Do I need to build SMTP server? if so, how should I do it?

You can try: http://www.lumisoft.ee/lsWWW/download/downloads/ .
There is SMTP server component what you can use to recieve emails.
Or alternatively there is SMTP server written in C#, you can write message filter for server.
In filter you can access incoming message and do what ever you want with it.
--- Yes also as others suggested will work ok too, you just run simple mail server and get emails by pop3 or imap. Pop3 and Imap components and example applications also included in same link.

You can use IIS6 to receive email and drop it into a specified folder. Your app can then pick up those emails and do whatever it needs to with them.

Active the SMTP service in IIS. It drops emails in the C:\inetpub\smtproot\drop folder IIRC.
Then you just need a Mime parser to read the EML files. I used the one in Lumisoft when I did the same thing.

You could use any Mailserver to receive the mail and have your application check the poxtbox every 1 minute to receive the mails.
When any mail arrived (or special subject as you need), you could execute your code.
For IMAP you could look at this Library

I have previously had some success using the Chilkat POP3 component to programmatically monitor a POP3 account for incoming mail.