sendmail.org

External Sendmail Links

Remote Access

• qpopper
• Cyrus (imapd)
• UW imapd
• IMAP in general
• Eric Raymond's fetchmail

Local Delivery Agents (LDAs) & Filters

• procmail
• Thanos Stathopoulos' SMS mailer

Miscellaneous

• Bill Wohler's Email References
• Majordomo FAQ
• Project Andrew Email Web Resources
• Simpler Webb's MS Exchange and Internet Mail (SMTP) Resource page

E-mail RFCs

Electronic Mail Related Request For Comments (RFCs):

• RFC 821 (Simple Mail Transfer Protocol) [Obsoleted by RFC 2821]
• RFC 822 (Internet Mail Header Format) [Obsoleted by RFC 2822]
• RFC 1123 (Internet Host Requirements)
• RFC 1869 (SMTP Service Extensions)
• RFC 1891 (SMTP Delivery Status Notifications)
• RFC 1892 (Multipart/Report)
• RFC 1893 (Mail System Status Codes)
• RFC 1894 (Delivery Status Notifications)
• RFC 1985 (SMTP Service Extension for Remote Message Queue Starting)
• RFC 2034 (SMTP Service Extension for Returning Enhanced Error Codes)
• RFC 2045 (MIME)
• RFC 2476 (Message Submission)
• RFC 2554 (SMTP Service Extension for Authentication)
• RFC 2821 (Simple Mail Transfer Protocol)
• RFC 2822 (Internet Mail Header Format)