GemBox.Email supports all standard protocols: POP3, IMAP4v1 and SMTP. Messages are represented by simple MailMessage model which wraps around more complex MIME model. MIME model classes can be found in GemBox.Email.Mime namespace.
Following is a more detailed list of GemBox.Email features.
Create mail message with attachments and multi-format message body.
Save and load mail messages to and from a MSG/EML/MHTML file or a stream.
Modify mail message headers using advanced MIME model.
Create and send complex mail messages using SMTP protocol.
List and modify folders using IMAP protocol.