MUA - Mail User Agent

Sends email when supplied with mail server, to address, from address, subject, and message.

Main: MailClient

Error checking:

• currently only checks for presence of '@' in email addresses

Planned features:

• more error checking
  • valid addresses
  • authentication supports
  • better error recovery
• support for CC/BCC, multiple recipients
• more headers
  • see RFC 822
• support for different reply codes (e.g. 251)