Subject: Undelivered Mail Returned to Sender
This is the mail system at host out21.sjc.mx.trendmicro.com.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 <firstname.lastname@example.org>: host j.mx.mail.yahoo.com[18.104.22.168] said: 554 Message not allowed -  (in reply to end of DATA command)
- Double-click the time on the right-bottom corner of the computer.
- Check for the correct day, month and time.
- Make the necessary changes and click OK.
- Once completed, send an email to someone with a Yahoo email address. The mail shold not be rejected anymore.