mailserver | May 18 05:42:42 mail postfix/lmtp[1041]: 87D5EA0192A1: to=<xxxx@qq.com>, relay=mail.sichuancredit.cn[/var/run/dovecot/lmtp], delay=0.12, delays=0.02/0.01/0.01/0.08, dsn=5.1.1, status=bounced (host mail.sichuancredit.cn[/var/run/dovecot/lmtp] said: 550 5.1.1 <12...