Invoices bouncing back

[Accounts2431]

Hello,

We tried to foward invoices from the system and certain customer invoices have not been delivered and bounced back.

Please find below the error message,

Sorry, email delivery was unsuccessful.
Subject: Invoice 
Destination: 
Sent: April 13th 2023, 2:09:55 pm
Message: Please contact us immediately if you are unable to detach or download your Invoice. Thank you.
Diagnostic-Code: rejected

For some other customers,

Diagnostic-Code: smtp; 550 spamcop.mimecast.org Blocked 

Could you please check and advise how to fix?

Thanks,

[Leneth_A]

Hi @Accounts2431

Thanks for your post. We are grateful that you found this forum useful.

The error and diagnostic-code that you are getting means that the recipient email address is either blocked by the firewall because it is detected as not trusted or it is misspelled/mistyped. 

If you do require further assistance feel free to reply to this post.

If my response has answered your enquiry please click "Accept as Solution" to assist other users find this information.

Cheers,
Leneth