| RFC | Title | Applies To | 
	
		| 1123 | Requirements for Internet Hosts | All Agents | 
	
		| 1157 | Simple Network Management Protocol (SNMP) | All Agents | 
	
		| 1213 | SNMP Management Information Base (MIB) | All Agents | 
	
		| 1215 | SNMP Trap Conventions | All Agents | 
	
		| 1426 | 8-bit SMTP Transport | SMTP Agent | 
	
		| 1456 | Vietnamese Character Message Encoding | Modular Web Agent | 
	
		| 1468 | Japanese Character Message Encoding | Modular Web Agent | 
	
		| 1777 | Lightweight Directory Access Protocol (LDAP) | Address Book Agent | 
	
		| 1869 | SMTP Extension Syntax | SMTP Agent | 
	
		| 1870 | SMTP Size Extension | SMTP Agent | 
	
		| 1891 | SMTP Delivery Status Notifications | SMTP Agent | 
	
		| 1922 | Chinese Character Message Encoding | Modular Web Agent | 
	
		| 1939 | Post Office Protocol Version 3 (POP3) | POP Agent | 
	
		| 1985 | SMTP Remote Message Queue Starting | SMTP Agent | 
	
		| 2045 | Multipurpose Internet Mail Extensions (MIME) | All Agents | 
	
		| 2046 | MIME Part II | All Agents | 
	
		| 2047 | MIME Part III | All Agents | 
	
		| 2086 | IMAP4 ACL Extension | IMAP Agent | 
	
		| 2195 | POP3\IMAP4 Authentication Command | POP, IMAP | 
	
		| 2197 | SMTP Command Pipelining | SMTP Agent | 
	
		| 2231 | MIME Charsets, Languages, and Continuations | All Agents | 
	
		| 2246 | Transport Layer Security (TLS) | SMTP, POP, IMAP, Modular Web, WebAdmin Agents | 
	
		| 2279 | Unicode* Transformation Format (UTF-8) | Modular Web Agent | 
	
		| 2311 | Secure MIME (S/MIME) | SMTP, POP, IMAP Agents | 
	
		| 2445 | Internet Calendaring and Scheduling Core Object Specification (iCalendar) | ModWeb Calendar Module | 
	
		| 2447 | iCalendar Message-Based Interoperability Protocol (iMIP) | ModWeb Calendar Module | 
	
		| 2449 | POP3 Extension Mechanism | POP Agent | 
	
		| 2459 | X.509v3 Client Certificates | SMTP, POP, IMAP, Modular Web, WebAdmin Agents | 
	
		| 2821 | Simple Mail Transfer Protocol (SMTP) | SMTP Agent | 
	
		| 2822 | ARPA Message Format | All Agents | 
	
		| 3501 | Internet Message Access Protocol (IMAP4rev1) | IMAP Agent | 
	
		| PKCS 1-12 | Public Key Cryptography Standards | SMTP, POP, IMAP, Modular Web, WebAdmin Agents |