We have recently been unable to recieve most of our e-mails. We formerly got the warning about once in a hundred messages. Now it occurs in 9 out of 10 messages. Typical notice:
firstname.lastname@example.org sent you an e-mail containing potentially harmful content
You are receiving this notice because email@example.com sent you a message containing potentially harmful content such as viruses or forbidden attachments. The message has been cleaned of its suspicious content and is enclosed as an attachment. If you have any doubts about the message or need more information, please contact your System Administrator
Suspicious content:File 'document_word.pif' has a forbidden name
How can we stop this from happening so frequently and access the messages with their attachments??