发件人地址的域不存在（在答复“发件人”命令中）

Question

我试图使用/usr/sbin/sendmail发送邮件，但遇到了发件人地址不存在的错误域（在回复来自邮件的命令中），我尝试使用不同的用户名，但问题仍然存在，有没有关于如何修复它的提示？在

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