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+     RFC # 561                           Abhay Bhushan (AKB) MIT-DMCG
+     NIC # 18516                          Ken Pogran (KP) MIT-MULTICS
+                                        Ray Tomlinson (RST) BBN-TENEX
+                                              Jim White (JEW) SRI-ARC
+                                                       5 September 73
+
+
+                    Standardizing Network Mail Headers
+
+
+                                                                       
+
+     One of the deficiences of the current FTP mail protocol is that
+     it makes no provision for the explicit specification of such
+     header information as author, title, and date.  Many systems
+     send that information, but each in a different format.  One
+     fairly serious result of this lack of standardization is that
+     it's next to impossible for a system or user program to
+     intelligently process incoming mail.                              
+
+     Although the long-term solution to the problem is probably to
+     add commands for specifying such information to the mail
+     protocol command space (as suggested in RFC 524 -- 17140,), we
+     hereby propose a more quickly implemented solution for the
+     interim.                                                          
+
+     We suggest that the text of network mail, whether transmitted
+     over the FTP telnet connection (via the MAIL command) or over a
+     separate data connection (with the MLFL command), be governed by
+     the syntax below:                                                 
+
+        Example:                                                      
+
+           From: White at SRI-ARC
+           Date: 24 JUL 1973 1527-PDT
+           Subject: Multi-Site Journal Meeting Announcement
+           NIC: 17996
+           
+           At 10 AM Wednesday 25-JULY there will be a meeting
+           to discuss a Multi-Site Journal in the context of
+           the Utility.  Y'all be here.                              
+
+        Formal Syntax:                                               
+
+           <mailtext>    ::= <header> <CRLF> <message>               
+           <header>      ::= <headeritem> ! <headeritem> <header>    
+           <headeritem>  ::= <item> <CRLF>                           
+           <item>        ::= <authoritem> ! <dateitem> !
+                             <subjectitem> ! <miscitem>              
+
+
+
+
+
+                                1
+     NWG/RFC# 561                   AKB KP RST JEW 5-SEP-73 11:19  18516
+     Standardizing Network Mail Headers           RFC 561 / NIC 18516
+
+
+
+           <authoritem>  ::= FROM: <SP> <user> <SP> AT <SP> <host>   
+           <dateitem>    ::= DATE: <SP> <date> <SP> <time> - <zone>  
+           <subjectitem> ::= SUBJECT: <SP> <line>                    
+           <miscitem>    ::= <keyword> : <SP> <line>                 
+           <date>        ::= <vdate> ! <tdate>                       
+           <vdate>       ::= <dayofmonth> <SP> <vmonth> <SP> <vyear>
+                                                                    
+           <tdate>       ::= <tmonth> / <dayofmonth> / <tyear>      
+           <dayofmonth>  ::= one or two decimal digits              
+           <vmonth>      ::= JAN ! FEB ! MAR ! APR ! MAY ! JUN !
+                             JUL ! AUG ! SEP ! OCT ! NOV ! DEC      
+           <tmonth>      ::= one or two decimal digits              
+           <vyear>       ::= four decimal digits                    
+           <tyear>       ::= two decimal digits                     
+           <zone>        ::= EST ! EDT ! CST ! CDT ! MST ! MDT !
+                             PST ! PDT ! GMT ! GDT                  
+           <time>        ::= four decimal digits                    
+           <user>        ::= <word>                                 
+           <host>        ::= a standard host name                   
+           <message>     ::= <line> <CRLF> ! <line> <CRLF> <message>
+                                                                    
+           <keyword>     ::= <word>                                 
+           <line>        ::= a string containing any of the 128 ASCII
+                             characters except CR and LF            
+           <word>        ::= a string containing any of the 128 ASCII
+                             characters except CR, LF, and SP       
+           <CRLF>        ::= CR LF                                  
+           <SP>          ::= space                                  
+
+        Please note the following:                                  
+
+           (1) <authoritem>, <dateitem>, and <subjectitem> may each
+           appear at most once in <header>; <miscitem> may occur any
+           number of times.  The order of <authoritem>, <dateitem>,
+           and <subjectitem> is insignificant, but they must proceed
+           all occurrences of <miscitem>.                           
+           (2) The case (upper or lower) of keywords -- specifically,
+           'FROM', 'DATE', 'SUBJECT' ,'AT', <host>, <zone>, <vmonth>
+           and <keyword> -- is insignificant.  Although 'FROM', for
+           example, appears in upper-case in the formal syntax above,
+           in the header of an actual message it may appear as 'From'
+           (as in the example), or 'from', or 'FrOm', etc.          
+           (3) No attempt has been made to legislate the format of
+           <user>, except to exclude spaces from it.                
+           (4) The time has no internal punctuation.                
+           (5) No provision is made for multiple authors.           
+
+     We recommend that mail-sending subsystems which prefix header
+     information to the text of the user's message be modified
+
+
+
+
+
+                                2
+     NWG/RFC# 561                   AKB KP RST JEW 5-SEP-73 11:19  18516
+     Standardizing Network Mail Headers           RFC 561 / NIC 18516
+
+
+
+     appropriately, and that other hosts recommend the above
+     conventions to their users.                                    
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+                                 3
+