我正在尝试使用/usr/sbin/sendmail发送邮件并运行到错误发件人地址域不存在（回复MAIL FROM命令），我尝试使用不同的用户名但问题仍然存在，任何指针如何解决它？
Date: Mon, 12 Feb 2018 22:28:32 -0800 (PST)
From: MAILER-DAEMON@fullusernames-MacBook-Pro-2.local (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender
To: username@fullusernames-MacBook-Pro-2.local
Auto-Submitted: auto-replied
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="28C8A2004E5238.1518503312/fullusernames-MacBook-Pro-2.local"
Content-Transfer-Encoding: 8bit
Message-Id: <20180213062832.A40612004E533E@fullusernames-MacBook-Pro-2.local>
This is a MIME-encapsulated message.
--28C8A2004E5238.1518503312/fullusernames-MacBook-Pro-2.local
Content-Description: Notification
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
This is the mail system at host fullusernames-macbook-pro-2.local.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<username@company.com>: host nwk-aaemail-lapp01.company.com[17.151.62.66] said: 553
5.1.8 Domain of sender address does not exist (in reply to MAIL FROM
command)
--28C8A2004E5238.1518503312/fullusernames-MacBook-Pro-2.local
Content-Description: Delivery report
Content-Type: message/delivery-status
Reporting-MTA: dns; fullusernames-MacBook-Pro-2.local
X-Postfix-Queue-ID: 28C8A2004E5238
X-Postfix-Sender: rfc822; username@fullusernames-MacBook-Pro-2.local
Arrival-Date: Mon, 12 Feb 2018 22:22:09 -0800 (PST)
Final-Recipient: rfc822; username@company.com
Original-Recipient: rfc822;username@company.com
Action: failed
Status: 5.1.8
Remote-MTA: dns; nwk-aaemail-lapp01.company.com
Diagnostic-Code: smtp; 553 5.1.8 Domain of sender address does not exist
--28C8A2004E5238.1518503312/fullusernames-MacBook-Pro-2.local
Content-Description: Undelivered Message
Content-Type: message/rfc822
Content-Transfer-Encoding: 8bit