QqMail .NET component 3.0

qqMail is a SMTP, POP & NNTP .NET class component. We wrote this component to enhance the functionality of native system.web.mail class, and offer possibilities to use POP & NNTP.
System.web.mail is a .NET class used for email delivery. However, it has very limited functions. For example, it does not support authentication, can only send pure text email format while many developers like to use MINE multipart email format.
Besides enhancing functionality of email delivery, our SMTP class offers two advanced features.
1. Direct send. Our class can do a DNS lookup for email domain MX record and send email directly to remote SMTP server. Email will arrive at destination inbox instantly.
2. Delivery verification. We verify each single sending to make sure email is delivered successfully, otherwise we will return the error message.