MailBee Message Queue   
http://www.afterlogic.com

MailBee Message Queue is a queue-based email-sending system that operates as a Windows NT service intercepting "send e-mail" requests from MailBee.SMTP objects and then sends email in a background. This allows MailBee.SMTP object to operate very quickly because MailBee.SMTP object is no longer waits for the email message to be actually sent. It is especially important when your application or ASP web page sends multiple messages at once. New version adds capabitlity to send multiple messages simultaneously.

MailBee Objects   
http://www.afterlogic.com

MailBee Objects is a set of powerful and easy-to-use COM objects sending, receiving and managing mail on SMTP, POP3 and IMAP4 servers. Smart and fast MIME parser, HTML and S/MIME mails, HTML mail safety (using MessageCensor component), ESMTP, SMTP queue, secure authentication, SSL/TLS (using SSL plugin), international charsets, email validation, multiple attachments, search for new/unread mails and mailbox management (IMAP4 only). Royalty-free distribution.

Pivo pop3 Component   
http://www.pivo.com

A high performance POP3 component enables ASP/ VB/ VC++/ C#/ VB.NET/ ASP.NET or other COM environment applications to retrieve email from mail server based on POP3 protocol. Pivo POP3 Object supports all operations. It also provides advanced features such as retrieve emails in background, capability of unlimited queued request. POP3 is a widely-deployed mail access protocol. Many programs access POP3 message stores, and thus need POP3 configuration information. Since there are multiple configuration elements which are required in order to access a mailbox, a single string representation is convenient. A POP3 mailbox (like an [IMAP4] mailbox) is a network resource, and URLs are a widely-supported generalized representation of network resources.A means of specifying a POP3 mailbox as a URL will likely be useful in many programs and protocols.

MailBee Objects   
http://www.iforum.com

MailBee Objects is a set of poweful and easy-to-use COM objects sending, receiving and managing mail on SMTP, POP3 and IMAP4 servers. Smart and fast MIME parser, HTML mails, HTML mail safety (using MessageCensor component), ESMTP, SMTP queue, secure authentication, SSL/TLS (using SSL plugin), international charsets, email validation, multiple attachments, search for new/unread mails and mailbox management (IMAP4 only). Royalty-free distribution.

MailBee SMTP   
http://www.iforum.com

MailBee SMTP is a powerful and easy to use COM object which enables ASP and Windows applications to create, send and queue mail to SMTP servers. Secure authentication, email validation, correct MIME composer, multiple attachments, and much more. Can be used in conjunction with SSL, POP3 and IMAP4 components. Royalty-free distribution.