#18: implement SMTP Submission (587/465), SASL PLAIN/LOGIN auth and preflight diagnostics

config/rspamd/actions.conf

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+# Score thresholds from PLAN.md section 10.1. The principle behind them is
+# that mail is refused during the SMTP session or delivered, never accepted
+# and silently discarded: a silent discard loses legitimate mail with nobody
+# aware of it.
+reject = 15;          # refuse with 550 5.7.1
+add_header = 4;       # tag as spam and let Sieve file it into Junk
+greylist = 9;         # ask the sender to retry

config/rspamd/logging.inc

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+type = "console";
+level = "info";

config/rspamd/options.inc

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+# DNS resolution is needed for RBL, SPF and DKIM lookups.
+dns {
+  nameserver = ["1.1.1.1", "8.8.8.8"];
+  timeout = 3s;
+}

config/rspamd/worker-normal.inc

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+# The protocols service reaches Rspamd over the internal network only; the
+# backend network has no route to the internet.
+bind_socket = "*:11333";