If you receive e-mail from Postmaster@concordia.ca with subject: "PureMessage has encountered the following event(s): Restricted attachment detected.", it means that email with ZIP file attachment is censored by the Concordia IT services "IITS".
You can get the details on the IT notices web site:
http://www.concordia.ca/content/shared/en/news/offices/vps/iits/notices/2015/03/26/email-security.html
Please send e-mail to the sender of the zip file and ask them to use another method to get the file to you. If it is someone within ENCS, they can use the ENCS file exchange utility to authorize anyone to upload files for you. The instructions on how to do that are on our web page:
How to send a large document via e-mail
