SMTP>> MAIL FROM:<usera@ok.example>
SMTP>> RCPT TO:<userb@test.ex>
cmd buf flush ddd bytes
+sync_responses expect mail
SMTP<< 250 OK
+sync_responses expect rcpt
SMTP<< 250 Accepted
LOG: MAIN
<= CALLER@myhost.test.ex U=CALLER P=local-smtp S=sss
continued connection, proxied TLS
SMTP>> DATA
cmd buf flush ddd bytes
+sync_responses expect data
SMTP<< 354 Enter message, ending with "." on a line by itself
SMTP>> writing message and terminating "."
cannot use sendfile for body: spoolfile not wireformat