1123

Requirements for Internet Hosts - Application and Support

1652

SMTP Service Extension for 8bit-MIME transport

1830

SMTP Service Extensions for Transmission of Large and Binary MIME Messages

1870

SMTP Service Extension for Message Size Declaration

1894

An Extensible Message Format for Delivery Status Notifications

2033

Local Mail Transfer Protocol

2034

SMTP Service Extension for Returning Enhanced Error Codes

2045 – 2049

Multipurpose Internet Mail Extensions

2222

Simple Authentication and Security Layer (SASL)

2231

MIME Value and Encoded Word Extensions

2245

Anonymous SASL Mechanism

2289

A One-Time Password System

2444

The One-Time-Password SASL Mechanism

2505

Anti-Spam Recommendations for SMTP MTAs

2646

The Text/Plain Format Parameter

2821

Simple Mail Transfer Protocol

2822

Internet Message Format

2831

Using Digest Authentication as a SASL Mechanism

2945

The SRP Authentication and Key Exchange System

3174

US Secure Hash Algorithm 1 (SHA1)