I don't know how many of you have ever used
ASPEmail. I installed it yesterday and it has been great so far. Good integration with .NET and lots of features. All over all, it is FREE! Highly recommended.
Feature Summary:
Sends e-mail using an external SMTP server programmatically.
Supports multiple recipients, CC's, BCC's, Reply-To's, file attachments.
Supports HTML format.
Embedded images and sounds (multipart/related).
Sends messages in both HTML and text formats (multipart/alternative).
Secure mail in the S/MIME format, when used in tandem with AspEncrypt.
Various SMTP authentication methods (enhanced in 5.0).
High-volume message queuing support.
Deferred message delivery.
NNTP support.
NEW Memory attachments.
NEW Up to 64 simultaneous SMTP sessions when sending out queued mail.
NEW Multiple attempts to resend a failed message.
NEW Bounced message handling.
NEW Full Unicode support in message body and headers.
NEW Advanced logging.