letter time zones has been shortened.

     C.5.  ADDRESS SPECIFICATION






     August 13, 1982              - 42 -                      RFC #822
 

 
     Standard for ARPA Internet Text Messages


     C.5.1.  ADDRESS

        The use of quoted-string, and the ":"-atom-":" construct, have
        been  removed.   An  address  now  is  either a single mailbox
        reference or is a named list of addresses.  The  latter  indi-
        cates a group distribution.

     C.5.2.  GROUPS

        Group lists are now required to to have a name.   Group  lists
        may not be nested.

     C.5.3.  MAILBOX

        A mailbox specification  may  indicate  a  person's  name,  as
        before.   Such  a  named  list  no longer may specify multiple
        mailboxes and may not be nested.

     C.5.4.  ROUTE ADDRESSING

        Addresses now are taken to be absolute, global specifications,
        independent  of transmission paths.  The  construct has
        been provided, to permit explicit specification  of  transmis-
        sion  path.   RFC  #733's  use  of multiple at-signs ("@") was
        intended as a general syntax  for  indicating  routing  and/or
        hierarchical addressing.  The current standard separates these
        specifications and only one at-sign is permitted.

     C.5.5.  AT-SIGN

        The string " at " no longer is used as an  address  delimiter.
        Only at-sign ("@") serves the function.

     C.5.6.  DOMAINS

        Hierarchical, logical name-domains have been added.

     C.6.  RESERVED ADDRESS

     The local-part "Postmaster" has been reserved, so that users  can
     be guaranteed at least one valid address at a site.










     August 13, 1982              - 43 -                      RFC #822
 

 
     Standard for ARPA Internet Text Messages


     D.  ALPHABETICAL LISTING OF SYNTAX RULES

     address     =  mailbox                      ; one addressee
                 /  group                        ; named list
     addr-spec   =  local-part "@" domain        ; global address
     ALPHA       =  <any ASCII alphabetic character>
                                                 ; (101-132, 65.- 90.)
                                                 ; (141-172, 97.-122.)
     atom        =  1*<any CHAR except specials, SPACE and CTLs>
     authentic   =   "From"       ":"   mailbox  ; Single author
                 / ( "Sender"     ":"   mailbox  ; Actual submittor
                     "From"       ":" 1#mailbox) ; Multiple authors
                                                 ;  or not sender
     CHAR        =  <any ASCII character>        ; (  0-177,  0.-127.)
     comment     =  "(" *(ctext / quoted-pair / comment) ")"
     CR          =  <ASCII CR, carriage return>  ; (     15,      13.)
     CRLF        =  CR LF
     ctext       =  <any CHAR excluding "(",     ; => may be folded
                     ")", "\" & CR, & including
                     linear-white-space>
     CTL         =  <any ASCII control           ; (  0- 37,  0.- 31.)
                     character and DEL>          ; (    177,     127.)
     date        =  1*2DIGIT month 2DIGIT        ; day month year
                                                 ;  e.g. 20 Jun 82
     dates       =   orig-date                   ; Original
                   [ resent-date ]               ; Forwarded