👁 Image
Mail.dll 3.0.26106.1822

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();
} 

Send emails using SMTP

MailBuilder builder = new MailBuilder();
builder.From.Add(new MailBox("from@example.com"));
builder.To.Add(new MailBox("to@example.com"));
builder.Subject = "Subject";
builder.Html = @"Html with an image: <img src=""cid:lena"" />";

var visual = builder.AddVisual(@"c:\lena.jpeg");
visual.ContentId = "lena";

var attachment = builder.AddAttachment(@"c:\tmp.doc");
attachment.SetFileName("document.doc", guessContentType: true);

IMail email = builder.Create();

using(Smtp smtp = new Smtp())
{
 smtp.Connect("smtp.server.com"); // or ConnectSSL for SSL
 smtp.UseBestLogin("user", "password");

 smtp.SendMessage(email); 
 smtp.Close(); 
}