+#
+# make ECDSA authentication preferred
+# DEFAULT:+RSA should work but does not seem to
+# also, will fail under TLS1.3 because there is no choice of auth
+# - so we disable that in the conf
+exim -DSERVER=server -DORDER=ECDSA:RSA:!COMPLEMENTOFDEFAULT -bd -oX PORT_D
+****
+client-ssl 127.0.0.1 PORT_D
+??? 220
+ehlo rhu.barb
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250
+starttls
+??? 220
+mail from:<CALLER@test.ex>
+??? 250
+rcpt to:<CALLER@test.ex>
+??? 250
+DATA
+??? 3
+This is a test encrypted message.
+It should be sent under the EC server cert and with an ECDSA cipher.
+.
+??? 250
+quit
+??? 221
+****
+killdaemon