Recipients of such messages are informed that an e-mail addressed to them has been blocked due to its attachment and from which e-mail address it was sent. The sender will also be informed of the reason for the non-delivery.
The HRZ has no further information, such as on the content of the e-mail. If you expected an e-mail from the sender, please contact them and ask them to resend the message with a converted attachment.
Further information on the affected blocked formats can be found here