Mail.dll

Mail.dll is a robust, commercial-grade .NET library for working with IMAP, SMTP, POP3, and MIME protocols.

It includes a powerful email and MIME parser, enabling you to send, receive, and process email messages in .NET applications.

The library supports:

• IMAP IDLE (push email)
• OAuth2 authentication (Gmail, Outlook)
• S/MIME encryption and signing
• Advanced MIME parsing

Additional features include:

• Built-in SSL/TLS support
• DKIM signing and verification
• A secure S/MIME parser for encrypted and digitally signed messages
• Parsers for iCal, vCard, and Outlook's .msg file format
• Support for decoding winmail.dat attachments

Getting started with Mail.dll

• Mail.dll main website
• Sample library
• Technical Q&A forum

Download emails using IMAP

using(Imap imap = new Imap())
{
    imap.ConnectSSL("imap.server.com");  // or Connect for non SSL/TLS
    imap.UseBestLogin("user", "password");

    imap.SelectInbox();
    List<long> uids = imap.Search(Flag.Unseen);
    foreach (long uid in uids)
    {
        var eml = imap.GetMessageByUID(uid);

        IMail email = new MailBuilder().CreateFromEml(eml);

        string subject = email.Subject;
    }
    imap.Close();
}

Download emails using POP3

using(Pop3 pop3 = new Pop3())
{
    pop3.ConnectSSL("pop3.server.com");  // or Connect for non SSL/TLS   
    pop3.UseBestLogin("user", "password");

    List<string> uids = pop3.GetAll();
    foreach (string uid in uids)
    {
        var eml = pop3.GetMessageByUID(uid);
        IMail email = new MailBuilder().CreateFromEml(eml);

        string subject = email.Subject;
    }
    pop3.Close();
}