X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/8e3e25cac127659fa8b15f1ead18e1a39642f66b..30dba1e609d941013dc8421de5104dad387ac5b1:/src/src/transports/autoreply.c diff --git a/src/src/transports/autoreply.c b/src/src/transports/autoreply.c index 719e358af..c16cf6e2f 100644 --- a/src/src/transports/autoreply.c +++ b/src/src/transports/autoreply.c @@ -1,4 +1,4 @@ -/* $Cambridge: exim/src/src/transports/autoreply.c,v 1.8 2006/02/07 11:19:03 ph10 Exp $ */ +/* $Cambridge: exim/src/src/transports/autoreply.c,v 1.9 2006/02/28 11:25:40 ph10 Exp $ */ /************************************************* * Exim - an Internet mail transport agent * @@ -277,6 +277,7 @@ uschar *from, *reply_to, *to, *cc, *bcc, *subject, *headers, *text, *file; uschar *logfile, *oncelog; uschar *cache_buff = NULL; uschar *cache_time = NULL; +uschar *message_id = NULL; header_line *h; time_t now = time(NULL); time_t once_repeat_sec = 0; @@ -590,9 +591,57 @@ for (h = header_list; h != NULL; h = h->next) if (h != NULL) { - uschar *s = Ustrchr(h->text, ':') + 1; - while (isspace(*s)) s++; - fprintf(f, "In-Reply-To: %s", s); + message_id = Ustrchr(h->text, ':') + 1; + while (isspace(*message_id)) message_id++; + fprintf(f, "In-Reply-To: %s", message_id); + } + +/* Generate a References header if there is at least one of Message-ID:, +References:, or In-Reply-To: (see RFC 2822). */ + +for (h = header_list; h != NULL; h = h->next) + if (h->type != htype_old && strncmpic(US"References:", h->text, 11) == 0) + break; + +if (h == NULL) + for (h = header_list; h != NULL; h = h->next) + if (h->type != htype_old && strncmpic(US"In-Reply-To:", h->text, 12) == 0) + break; + +/* We limit the total length of references. Although there is no fixed +limit, some systems do not like headers growing beyond recognition. +Keep the first message ID for the thread root and the last few for +the position inside the thread, up to a maximum of 12 altogether. */ + +if (h != NULL || message_id != NULL) + { + fprintf(f, "References:"); + if (h != NULL) + { + uschar *s, *id, *error; + uschar *referenced_ids[12]; + int reference_count = 0; + int i; + + s = Ustrchr(h->text, ':') + 1; + parse_allow_group = FALSE; + while (*s != 0 && (s = parse_message_id(s, &id, &error)) != NULL) + { + if (reference_count == sizeof(referenced_ids)/sizeof(uschar *)) + { + memmove(referenced_ids + 1, referenced_ids + 2, + sizeof(referenced_ids) - 2*sizeof(uschar *)); + referenced_ids[reference_count - 1] = id; + } + else referenced_ids[reference_count++] = id; + } + for (i = 0; i < reference_count; ++i) fprintf(f, " %s", referenced_ids[i]); + } + + /* The message id will have a newline on the end of it. */ + + if (message_id != NULL) fprintf(f, " %s", message_id); + else fprintf(f, "\n"); } /* Add an Auto-Submitted: header */