when using the no-reply address which is used to stop anti-spoofing controls in external mail systems blocking emails , sometimes the email is rejected as it is detected as spam as one email address is sending the same mail to many users at the same time

error when rejecting mails :
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx-eu.mail.am0.yahoodns.net
Diagnostic-Code: smtp; 550 OutgoingFilter Scanner failed