>>> 250 HELP
>>> ip4.ip4.ip4.ip4 in hosts_avoid_pipelining? no (option unset)
>>> ip4.ip4.ip4.ip4 in hosts_require_auth? no (option unset)
->>> SMTP>> MAIL FROM:<>
+>>> SMTP|> MAIL FROM:<>
>>> SMTP>> RCPT TO:<rcptuser@dane256ee.test.ex>
>>> cmd buf flush 52 bytes
>>> SMTP<< 250 OK