>>> SMTP<< 220 server ready
>>> 127.0.0.1 in hosts_avoid_esmtp? no (option unset)
>>> SMTP>> EHLO myhost.test.ex
+>>> cmd buf flush 21 bytes
>>> SMTP<< 250 OK
>>> 127.0.0.1 in hosts_require_auth? no (option unset)
->>> SMTP>> MAIL FROM:<CALLER@myhost.test.ex>
+>>> SMTP>> MAIL FROM:<sender@myhost.test.ex>
+>>> cmd buf flush 35 bytes
>>> SMTP<< 250 OK
>>> SMTP>> RCPT TO:<verify@domain.com>
+>>> cmd buf flush 29 bytes
>>> SMTP<< 250 OK
>>> holding verify callout open for cutthrough delivery
>>> ----------- end verify ------------
>>> accept: condition test succeeded in ACL "ar"
>>> end of ACL "ar": ACCEPT
>>> SMTP>> QUIT
+>>> SMTP<< 220 OK
+>>> SMTP(close)>>
>>> ----------- cutthrough shutdown (host-checking mode) ------------
-LOG: 10HmaY-0005vi-00 <= CALLER@myhost.test.ex H=(myhost.test.ex) [1.2.3.4] P=esmtp S=sss for verify@domain.com
+LOG: 10HmaY-0005vi-00 <= sender@myhost.test.ex H=(myhost.test.ex) [1.2.3.4] P=esmtp S=sss for verify@domain.com