在 postfix 中，我无法接收来自特定域的邮件，但我可以向它发送邮件。
出于某种原因，postfix 认为域是内部的，如果我错了，请纠正我？
来自 postfix 邮件日志的示例：
Sep 17 18:45:52 smail1 postfix/smtp[23241]: 269D140A92: to=<prvs=7337e4471e=johnd@abc.co.il>, relay=mail1.abc.co.il[5.6.7.8]:25, delay=0.28, delays=0/0/0.27/0.01, dsn=5.0.0, status=undeliverable (host mail1.abc.co.il[5.6.7.8] said: 550 Recipient address rejected: User unknown (in reply to RCPT TO command))
Sep 17 18:45:55 smail1 postfix/smtpd[23196]: send attr address = prvs=7337e4471e=johnd@abc.co.il
Sep 17 18:45:55 smail1 postfix/smtpd[23196]: input attribute value: host mail1.abc.co.il[5.6.7.8] said: 550 Recipient address rejected: User unknown (in reply to RCPT TO command)
Sep 17 18:45:55 smail1 postfix/smtpd[23196]: check_mail_access: prvs=7337e4471e=johnd@abc.co.il
Sep 17 18:45:55 smail1 postfix/smtpd[23196]: …