Mail Expert is an activeX DLL for sending SMTP / MIME E-Mail. It has all the features you need to create a professional e-mail sending application and it is smart, flexible and expandable. Smart because unless you explicitly overwrite a setting, it will select the most correct settings for you.
Mail Expert Main Features:
Supports Asynchronous email sending
Supports authentication for SMTP servers that require a login and password
Supports RFC 822 (plain messages), MIME conformant Base 64, quoted-printable, Binary and UUencode email messages
Provides events to monitor progress, request and response messages and completion of email sending.