ASPMail

ASPMail allows you to send mail using the standard SMTP protocol from any program that can use ActiveX/OLE components, including ASP. Features include:

  1. SMTP (sending) Messages
  2. Multiple File Attachments
  3. File attachments support MIME and UUEncoding
  4. US Ascii and ISO-8859-1 character sets
  5. Subject line encoding for 8bit message subjects
  6. Redundant SMTP servers (If the primary SMTP server is down, the secondary server is used)
  7. Special Header Support (Standard X-Priority headers, MS Mail (including Exchange) priority headers, Urgent header, ConfirmReading and ReturnReceipt Headers)

Documentation: