-/* $Cambridge: exim/src/src/verify.c,v 1.36 2006/04/04 11:18:31 ph10 Exp $ */
+/* $Cambridge: exim/src/src/verify.c,v 1.39 2006/09/25 11:25:37 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
BOOL callout_random = (options & vopt_callout_random) != 0;
int yield = OK;
+int old_domain_cache_result = ccache_accept;
BOOL done = FALSE;
uschar *address_key;
uschar *from_address;
if (cache_record != NULL)
{
- /* If an early command (up to and including MAIL FROM:<>) was rejected,
- there is no point carrying on. The callout fails. */
-
- if (cache_record->result == ccache_reject)
+ /* In most cases, if an early command (up to and including MAIL FROM:<>)
+ was rejected, there is no point carrying on. The callout fails. However, if
+ we are doing a recipient verification with use_sender or use_postmaster
+ set, a previous failure of MAIL FROM:<> doesn't count, because this time we
+ will be using a non-empty sender. We have to remember this situation so as
+ not to disturb the cached domain value if this whole verification succeeds
+ (we don't want it turning into "accept"). */
+
+ old_domain_cache_result = cache_record->result;
+
+ if (cache_record->result == ccache_reject ||
+ (*from_address == 0 && cache_record->result == ccache_reject_mfnull))
{
setflag(addr, af_verify_nsfail);
HDEBUG(D_verify)
int host_af;
int port = 25;
BOOL send_quit = TRUE;
+ uschar *active_hostname = smtp_active_hostname;
uschar *helo = US"HELO";
uschar *interface = NULL; /* Outgoing interface to use; NULL => any */
uschar inbuffer[4096];
log_write(0, LOG_MAIN|LOG_PANIC, "<%s>: %s", addr->address,
addr->message);
+ /* Expand the helo_data string to find the host name to use. */
+
+ if (tf->helo_data != NULL)
+ {
+ uschar *s = expand_string(tf->helo_data);
+ if (active_hostname == NULL)
+ log_write(0, LOG_MAIN|LOG_PANIC, "<%s>: failed to expand transport's "
+ "helo_data value for callout: %s", expand_string_message);
+ else active_hostname = s;
+ }
+
deliver_host = deliver_host_address = NULL;
deliver_domain = save_deliver_domain;
continue;
}
- /* Wait for initial response, and then run the initial SMTP commands. The
- smtp_write_command() function leaves its command in big_buffer. This is
- used in error responses. Initialize it in case the connection is
- rejected. */
+ /* Wait for initial response, and send HELO. The smtp_write_command()
+ function leaves its command in big_buffer. This is used in error responses.
+ Initialize it in case the connection is rejected. */
Ustrcpy(big_buffer, "initial connection");
done =
smtp_read_response(&inblock, responsebuffer, sizeof(responsebuffer),
'2', callout) &&
-
smtp_write_command(&outblock, FALSE, "%s %s\r\n", helo,
- smtp_active_hostname) >= 0 &&
+ active_hostname) >= 0 &&
smtp_read_response(&inblock, responsebuffer, sizeof(responsebuffer),
- '2', callout) &&
+ '2', callout);
+
+ /* Failure to accept HELO is cached; this blocks the whole domain for all
+ senders. I/O errors and defer responses are not cached. */
+
+ if (!done)
+ {
+ *failure_ptr = US"mail"; /* At or before MAIL */
+ if (errno == 0 && responsebuffer[0] == '5')
+ {
+ setflag(addr, af_verify_nsfail);
+ new_domain_record.result = ccache_reject;
+ }
+ }
+
+ /* Send the MAIL command */
+ else done =
smtp_write_command(&outblock, FALSE, "MAIL FROM:<%s>\r\n",
from_address) >= 0 &&
smtp_read_response(&inblock, responsebuffer, sizeof(responsebuffer),
'2', callout);
- /* If the host gave an initial error, or does not accept HELO or MAIL
- FROM:<>, arrange to cache this information, but don't record anything for an
- I/O error or a defer. Do not cache rejections when a non-empty sender has
- been used, because that blocks the whole domain for all senders. */
+ /* If the host does not accept MAIL FROM:<>, arrange to cache this
+ information, but again, don't record anything for an I/O error or a defer. Do
+ not cache rejections of MAIL when a non-empty sender has been used, because
+ that blocks the whole domain for all senders. */
if (!done)
{
- *failure_ptr = US"mail";
+ *failure_ptr = US"mail"; /* At or before MAIL */
if (errno == 0 && responsebuffer[0] == '5')
{
setflag(addr, af_verify_nsfail);
- if (from_address[0] == 0) new_domain_record.result = ccache_reject;
+ if (from_address[0] == 0)
+ new_domain_record.result = ccache_reject_mfnull;
}
}
/* Otherwise, proceed to check a "random" address (if required), then the
given address, and the postmaster address (if required). Between each check,
issue RSET, because some servers accept only one recipient after MAIL
- FROM:<>. */
+ FROM:<>.
+
+ Before doing this, set the result in the domain cache record to "accept",
+ unless its previous value was ccache_reject_mfnull. In that case, the domain
+ rejects MAIL FROM:<> and we want to continue to remember that. When that is
+ the case, we have got here only in the case of a recipient verification with
+ a non-null sender. */
else
{
- new_domain_record.result = ccache_accept;
+ new_domain_record.result =
+ (old_domain_cache_result == ccache_reject_mfnull)?
+ ccache_reject_mfnull: ccache_accept;
/* Do the random local part check first */
The value of the result field in the new_domain record is ccache_unknown if
there was an error before or with MAIL FROM:, and errno was not zero,
implying some kind of I/O error. We don't want to write the cache in that case.
-Otherwise the value is ccache_accept or ccache_reject. */
+Otherwise the value is ccache_accept, ccache_reject, or ccache_reject_mfnull. */
if (!callout_no_cache && new_domain_record.result != ccache_unknown)
{
{
host_item *host_list = addr->host_list;
- /* Default, if no remote transport, to NULL for the interface (=> any),
- "smtp" for the port, and "smtp" for the protocol. */
-
- transport_feedback tf = { NULL, US"smtp", US"smtp", NULL, FALSE, FALSE };
+ /* Make up some data for use in the case where there is no remote
+ transport. */
+
+ transport_feedback tf = {
+ NULL, /* interface (=> any) */
+ US"smtp", /* port */
+ US"smtp", /* protocol */
+ NULL, /* hosts */
+ US"$smtp_active_hostname", /* helo_data */
+ FALSE, /* hosts_override */
+ FALSE, /* hosts_randomize */
+ FALSE, /* gethostbyname */
+ TRUE, /* qualify_single */
+ FALSE /* search_parents */
+ };
/* If verification yielded a remote transport, we want to use that
transport's options, so as to mimic what would happen if we were really
discarded, usually because of the use of :blackhole: in an alias file. */
if (allok && addr_local == NULL && addr_remote == NULL)
+ {
fprintf(f, "mail to %s is discarded\n", address);
+ return yield;
+ }
-else for (addr_list = addr_local, i = 0; i < 2; addr_list = addr_remote, i++)
+for (addr_list = addr_local, i = 0; i < 2; addr_list = addr_remote, i++)
{
while (addr_list != NULL)
{
if(addr->p.srs_sender)
fprintf(f, " [srs = %s]", addr->p.srs_sender);
#endif
+
+ /* If the address is a duplicate, show something about it. */
+
+ if (!testflag(addr, af_pfr))
+ {
+ tree_node *tnode;
+ if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
+ fprintf(f, " [duplicate, would not be delivered]");
+ else tree_add_duplicate(addr->unique, addr);
+ }
+
+ /* Now show its parents */
+
while (p != NULL)
{
fprintf(f, "\n <-- %s", p->address);
git://git.exim.org / exim.git / blobdiff