>>> SMTP>> QUIT
>>> SMTP<< 220 OK
>>> SMTP(close)>>
+>>> cmdlog: '220:EHLO:250:MAIL:250:RCPT:250:QUIT:220'
>>> ----------- cutthrough shutdown (host-checking mode) ------------
LOG: 10HmaY-0005vi-00 <= sender@myhost.test.ex H=(myhost.test.ex) [1.2.3.4] P=esmtp S=sss for verify@domain.com