From Dacons International:
Mailit lets you send, receive and parse e-mails with your applications. No knowledge of e-mail protocols is required to leverage Mailit in your projects. Mailit provides rock-solid implementation of all major email standards including SMTP, POP, IMAP4 and MIME including TLS/SSL. Make use of DaconsTM 10 years expertise in email and leverage high quality yet cost efficient email functionality in your application. Mailit for C/C++ supports SMTP, POP, IMAP4, and MIME including TLS/SSL.