从服务器发送邮件时邮件服务器工作正常，但是当我使用某些邮件客户端时它不起作用。
我在日志中发现了这个：
Jul 12 19:45:04 tvsite postfix/smtpd[3356]: warning: hostname adsl-bb29-l44 does not resolve to address xxx.xxx.xxx.xxx: Name or service not known
Jul 12 19:45:04 tvsite postfix/smtpd[3356]: connect from unknown[xxx.xxx.xxx.xxx]
Jul 12 19:45:04 tvsite postfix/smtpd[3356]: NOQUEUE: reject: RCPT from unknown[xxx.xxx.xxx.xxx4]: 454 4.7.1 <dabeticmisko4@gmail.com>: Relay access denied; from=<sha1@tvsite.tvsite.uni.me> to=<dabeticmisko4@gmail.com> proto=ESMTP helo=<S>
Jul 12 19:45:04 tvsite postfix/smtpd[3356]: lost connection after RCPT from unknown[xxx.xxx.xxx.xxx]
Jul 12 19:45:04 tvsite postfix/smtpd[3356]: disconnect from unknown[xxx.xxx.xxx.xxx]
我的邮件客户端也回复了这条消息：
Client does not have permission to submit mail to this server. …