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-rw-r--r--doc/doc-txt/ChangeLog3
-rw-r--r--src/src/transports/smtp.c7
2 files changed, 8 insertions, 2 deletions
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index c528ada99..f9eaaf7a9 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -68,6 +68,9 @@ JH/05 Permit multiple router/transport headers_add/remove lines.
JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
+JH/07 Avoid using a waiting database for a single-message-only transport.
+ Performance patch from Paul Fisher.
+
Exim version 4.80
-----------------
diff --git a/src/src/transports/smtp.c b/src/src/transports/smtp.c
index f7af921af..36a053f2c 100644
--- a/src/src/transports/smtp.c
+++ b/src/src/transports/smtp.c
@@ -3114,9 +3114,12 @@ for (addr = addrlist; addr != NULL; addr = addr->next)
/* Update the database which keeps information about which messages are waiting
for which hosts to become available. For some message-specific errors, the
update_waiting flag is turned off because we don't want follow-on deliveries in
-those cases. */
+those cases. If this transport instance is explicitly limited to one message
+per connection, follow-on deliveries are not possible, and there's no need
+to create/update a waiting database. */
-if (update_waiting) transport_update_waiting(hostlist, tblock->name);
+if (update_waiting && tblock->connection_max_messages != 1)
+ transport_update_waiting(hostlist, tblock->name);
END_TRANSPORT: