external/ibm-public/postfix/dist/src/local/indirect.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      indirect 3
   6 /* SUMMARY
   7 /*      indirect delivery
   8 /* SYNOPSIS
   9 /*      #include "local.h"
  10 /*
  11 /*      void    deliver_indirect(state)
  12 /*      LOCAL_STATE state;
  13 /*      char    *recipient;
  14 /* DESCRIPTION
  15 /*      deliver_indirect() delivers a message via the message
  16 /*      forwarding service, with duplicate filtering up to a
  17 /*      configurable number of recipients.
  18 /*
  19 /*      Arguments:
  20 /* .IP state
  21 /*      The attributes that specify the message, sender and more.
  22 /*      A table with the results from expanding aliases or lists.
  23 /* CONFIGURATION VARIABLES
  24 /*      duplicate_filter_limit, duplicate filter size limit
  25 /* DIAGNOSTICS
  26 /*      The result is non-zero when the operation should be tried again.
  27 /* LICENSE
  28 /* .ad
  29 /* .fi
  30 /*      The Secure Mailer license must be distributed with this software.
  31 /* AUTHOR(S)
  32 /*      Wietse Venema
  33 /*      IBM T.J. Watson Research
  34 /*      P.O. Box 704
  35 /*      Yorktown Heights, NY 10598, USA
  36 /*--*/
  37
  38 /* System library. */
  39
  40 #include <sys_defs.h>
  41 #include <unistd.h>
  42
  43 /* Utility library. */
  44
  45 #include <msg.h>
  46 #include <htable.h>
  47
  48 /* Global library. */
  49
  50 #include <mail_params.h>
  51 #include <bounce.h>
  52 #include <defer.h>
  53 #include <been_here.h>
  54 #include <sent.h>
  55
  56 /* Application-specific. */
  57
  58 #include "local.h"
  59
  60 /* deliver_indirect - deliver mail via forwarding service */
  61
  62 int     deliver_indirect(LOCAL_STATE state)
  63 {
  64
  65     /*
  66      * Suppress duplicate expansion results. Add some sugar to the name to
  67      * avoid collisions with other duplicate filters. Allow the user to
  68      * specify an upper bound on the size of the duplicate filter, so that we
  69      * can handle huge mailing lists with millions of recipients.
  70      */
  71     if (msg_verbose)
  72         msg_info("deliver_indirect: %s", state.msg_attr.rcpt.address);
  73     if (been_here(state.dup_filter, "indirect %s",
  74                   state.msg_attr.rcpt.address))
  75         return (0);
  76
  77     /*
  78      * Don't forward a trace-only request.
  79      */
  80     if (DEL_REQ_TRACE_ONLY(state.request->flags)) {
  81         dsb_simple(state.msg_attr.why, "2.0.0", "forwards to %s",
  82                    state.msg_attr.rcpt.address);
  83         return (sent(BOUNCE_FLAGS(state.request), SENT_ATTR(state.msg_attr)));
  84     }
  85
  86     /*
  87      * Send the address to the forwarding service. Inherit the delivered
  88      * attribute from the alias or from the .forward file owner.
  89      */
  90     if (forward_append(state.msg_attr)) {
  91         dsb_simple(state.msg_attr.why, "4.3.0", "unable to forward message");
  92         return (defer_append(BOUNCE_FLAGS(state.request),
  93                              BOUNCE_ATTR(state.msg_attr)));
  94     }
  95     return (0);
  96 }