Your Email was blocked:

Status message:

“Sending has been prevented because the recipient’s address is on an internal system blocklist. Please check whether the recipient’s Email address exists and can generally receive Emails. If this is the case, please ask your organization administrator to contact Onventis Customer Service to resolve the issue.”

If the server responds with a hard bounce, it signals that there is a permanent reason why an Email cannot be delivered. Destination addresses for which we receive a hard bounce in response are automatically placed on a blocklist. As soon as an Email address is on the blocklist, no more Emails are sent to it. This leads to a “Delivery Failed” status and the status message ” The receiver’s Email address is in our blocklist. Contact your organization administrator”.

This is a protective mechanism, as repeatedly sending an Email to an invalid or non-existent address can lead to the sender being classified as a SPAM sender. It protects our reputation and thus the entire mailing process.

The most common reason why a server responds with a hard bounce is that the target address does not exist there. If one of your Emails is blocked, we ask you to contact the recipient and check with them whether the address is correct and whether they can currently receive Emails. If both are the case, please contact our support to have the Email address unblocked.