I've already hacked 3.32 to do this, but it would be very nice not to have
to do it for every future upgrade. The diffs for the 3.32 hack are
included in my message under the subject "using exim as a secondary MX".
The feature is this. I need to be able to specify domain names which, if
used for an MX record on an arbitrary domain, allow said domain to be
relayed through my server.
I've sent a couple of emails through describing this functionality, and
I've reincluded the diffs here which describe the functionality best. If
you have any questions or I need to justify my desire for this more,
please let me know =).
--John
*** globals.c.orig Mon Oct 22 13:25:55 2001
--- globals.c Mon Oct 22 13:21:38 2001
***************
*** 134,139 ****
--- 134,142 ----
BOOL address_test_mode = FALSE;
gid_t *admin_groups = NULL;
BOOL admin_user = FALSE;
+ #ifdef WCSMXHACK
+ char *allow_mx_of = NULL;
+ #endif
BOOL allow_mx_to_ip = FALSE;
BOOL allow_unqualified_recipient = TRUE; /* For local messages */
BOOL allow_unqualified_sender = TRUE; /* Reset for SMTP */
*** globals.h.orig Mon Oct 22 13:26:00 2001
--- globals.h Mon Oct 22 13:19:33 2001
***************
*** 104,109 ****
--- 104,112 ----
extern BOOL address_test_mode; /* True for -bt */
extern gid_t *admin_groups; /* List of admin groups */
extern BOOL admin_user; /* True if caller can do admin */
+ #ifdef WCSMXHACK
+ extern char *allow_mx_of; /* relay if domain's MX in this list */
+ #endif
extern BOOL allow_mx_to_ip; /* Allow MX records to -> ip address */
extern BOOL allow_unqualified_recipient; /* As it says */
extern BOOL allow_unqualified_sender; /* Ditto */
*** smtp_in.c.orig Mon Oct 22 10:56:17 2001
--- smtp_in.c Mon Oct 22 13:58:17 2001
***************
*** 3022,3027 ****
--- 3022,3068 ----
}
}
+ #ifdef WCSMXHACK
+ if (!permitted && allow_mx_of) {
+ host_item h;
+ host_item *h2;
+ BOOL removed;
+ int rc;
+
+ h.next = NULL;
+ h.name = lcdomain;
+ h.address = NULL;
+
+ rc = host_find_bydns(&h,
+ NULL, /* ignore list */
+ TRUE, /* DNS only */
+ FALSE, /* not A only */
+ FALSE, /* no widening */
+ FALSE, /* no widening */
+ NULL, /* no feedback FQDN */
+ &removed); /* feedback if local removed */
+
+ if (rc == HOST_FOUND) {
+ h2 = &h;
+ if (h2->name) {
+ do {
+ if (match_isinlist(h2->name, &allow_mx_of, TRUE, TRUE, NULL)) {
+ HDEBUG(9) debug_printf("domain is MXed to this host (2)\n");
+ permitted = TRUE;
+ break;
+ }
+ h2 = h2->next;
+ } while (h2);
+ }
+ } else if (rc == HOST_FIND_AGAIN) {
+ relay_msg1 = "%d temporarily unable to check <%s> for relaying "
+ "permission\r\n";
+ relay_msg2 = "temporarily ";
+ relay_errcode = 451;
+ }
+ }
+ #endif
+
/* Forbidden relaying. */
if (!permitted)
*** readconf.c.orig Mon Oct 22 13:25:43 2001
--- readconf.c Mon Oct 22 13:22:52 2001
***************
*** 35,40 ****
--- 35,43 ----
{ "accept_8bitmime", opt_bool, &accept_8bitmime },
{ "accept_timeout", opt_time, &accept_timeout },
{ "admin_groups", opt_gidlist, &admin_groups },
+ #ifdef WCSMXHACK
+ { "allow_mx_of", opt_stringptr, &allow_mx_of },
+ #endif
{ "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
{ "always_bcc", opt_bool, &always_bcc },
#ifdef HAVE_AUTH
