550 permanent failure for one or more recipients blocked.

Products

• Messaging Gateway

Issue/Introduction

I want to send an e-mail to [email protected], but I get the following error message.

 

 550 permanent failure for one or more recipients blocked.

Resolution

The error message "550 permanent failure for one or more recipients blocked" indicates that the email was rejected by the recipient's email server. This typically happens for reasons such as spam filters, blacklisting, or specific policies on the recipient's server and it good to troubleshoot together with the owner of the domain.

Ensure that the email address is correctly spelled and active. Do you have the same issue with other recipient in that domain or just with only that one?

If you have option/possibility ask the recipient to check their email server logs or whitelist your domain/IP. Provide them with the details of the error message and any relevant timestamps.