Better comments.

svn path=/trunk/; revision=2680

diff --git a/sink.c b/sink.c
index bb9522fb60555a974984cebdb62c004466989a3f..e3cb4a8fc21e4e2bade12f005b21e0b0c54c4043 100644 (file)
--- a/sink.c
+++ b/sink.c
@@ -395,12 +395,12 @@ static int handle_smtp_report(struct query *ctl, struct msgblk *msg)
         * coming from this address, probably due to an
         * anti-spam domain exclusion.  Respect this.  Don't
         * try to ship the message, and don't prevent it from
-        * being deleted.  Typical values:
+        * being deleted.  Default values:
         *
-        * 501 = exim's old antispam response
-        * 550 = exim's new antispam response (temporary)
-        * 553 = sendmail 8.8.7's generic REJECT 
         * 571 = sendmail's "unsolicited email refused"
+        * 550 = exim's new antispam response (temporary)
+        * 501 = exim's old antispam response
+        * 554 = Postfix antispam response.
         *
         */
        SMTP_rset(ctl->smtp_socket);    /* stay on the safe site */
@@ -454,7 +454,10 @@ static int handle_smtp_report(struct query *ctl, struct msgblk *msg)
     case 553: /* invalid sending domain */
        /*
         * These latter days 553 usually means a spammer is trying to
-        * cover his tracks.
+        * cover his tracks.  We never bouncemail on these, because 
+        * (a) the return address is invalid by definition, and 
+        * (b) we wouldn't want spammers to get confirmation that
+        * this address is live, anyway.
         */
        SMTP_rset(ctl->smtp_socket);    /* stay on the safe side */
        send_bouncemail(ctl, msg, XMIT_ACCEPT,