Set "RCPT" to sis.DeliveryMatter{Command: "RCPT"} when the value of ReplyCode is 551

[azumakuniyuki]

The following samples that have the 551 in replycode

p5-sisimai(0) % find t xt -type f -name '*-lhost-*.t' -exec grep "'551'" {} +
t/791-lhost-sendmail.t:    '17' => [['5.1.6',   '551', 'hasmoved',        1]],
t/791-lhost-sendmail.t:    '22' => [['5.1.6',   '551', 'hasmoved',        1]],
t/641-lhost-dragonfly.t:    '19' => [['5.7.1',   '551', 'securityerror',   0]],
t/653-lhost-exim.t:    '40' => [['5.0.901', '551', 'requireptr',      0]],
xt/791-lhost-sendmail.t:    '1129'  => [['5.1.6',   '551', 'hasmoved',        1]],
xt/791-lhost-sendmail.t:    '1176'  => [['5.1.6',   '551', 'hasmoved',        1]],
xt/760-lhost-postfix.t:    '1011'  => [['5.0.0',   '551', 'systemerror',     0]],
xt/760-lhost-postfix.t:    '1028'  => [['5.0.0',   '551', 'suspend',         0]],
xt/760-lhost-postfix.t:    '1105'  => [['5.0.0',   '551', 'spamdetected',    0]],
xt/653-lhost-exim.t:    '1119'  => [['5.0.901', '551', 'requireptr',      0]],
xt/653-lhost-exim.t:    '1147'  => [['5.0.901', '551', 'blocked',         0]],

[azumakuniyuki]

• lhost-sendmail-17.eml (DATA) 450 busy - please try later 551 not our user 503 need RCPT command [data] 551 not our user
• lhost-sendmail-22.eml (DATA) 450 busy - please try later 551 not our user 503 need RCPT command [data] 551 not our user
• lhost-dragonfly-19.eml (RCPT)
• lhost-exim-40.eml (MAIL) SMTP error from remote mail server after MAIL FROM:<...
• lhost-sendmail/1129 (DATA) 450 busy - please try later 551 not our user 503 need RCPT command [data] 551 not our user
• lhost-sendmail/1176 (DATA) 450 busy - please try later 551 not our user 503 need RCPT command [data] 551 not our user
• lhost-postfix/1011 (DATA) said: 551 Requested action aborted: local error in processing (in reply to end of DATA command)
• lhost-postfix/1028 (RCPT)
• lhost-postfix/1105 (DATA) said: 551 5.0.0 This message was classified as spam (in reply to end of DATA command)
• lhost-exim/1119 (MAIL)
• lhost-exim/1147 (MAIL) SMTP error from remote mail server after MAIL FROM:<info@...