这是maillog日志:
Nov 15 16:58:07 localhost postfix/smtpd[26909]: connect from localhost.localdomain[127.0.0.1]
Nov 15 16:58:22 localhost postfix/smtpd[26909]: lost connection after CONNECT from localhost.localdomain[127.0.0.1]
Nov 15 16:58:22 localhost postfix/smtpd[26909]: disconnect from localhost.localdomain[127.0.0.1]
Nov 15 17:01:02 localhost postfix/smtpd[26934]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled
Nov 15 17:01:02 localhost postfix/smtpd[26934]: connect from localhost.localdomain[127.0.0.1]
Nov 15 17:01:23 localhost postfix/smtpd[26934]: NOQUEUE: reject: RCPT from localhost.localdomain[127.0.0.1]: 550 5.1.1 <NT2@qq.com>: Recipient address rejected: User unknown in local recipient table; from=<root@qq.com> to=<NT2@qq.com> proto=SMTP helo=<localhost>