...
- A Highly Scalable Electronic Mail Service Using Open Systems (Christenson, et al)
- Sendmail Performance Tuning (Christenson)
- Mailbox Format Characteristics (Crispen)
- RFC 3834 - Recommendations for Automatic Responses to Electronic Mail
- RFC 5064 - The Archived-At Message Header Field draft
- RFC 2033 - Local Mail Transfer Protocol
- RFC 4871DomainKey Identified Mail (DKIM)
- OpenID
- RFC 1893 - Enhanced Mail System Status Codes
- RFC 2034 - SMTP Service Extension for Returning Enhanced Error Codes
- Bounce Address Tag Validation (BATV)
- Extensible Format for Email Feedback Reports
- Forgotten Password recommendations from OWASP
Best practices:
- Anti-spam and anti-backscatter
...