Recently there have been reports of emails with the Subject: Membership Suspension notice and the From beginning with  File Sharing From... (a non-IPMS email address)

They are a phishing / scam attempt.  Please delete them immediately and do not open the attachment.

This is a common practice and members should be wary of any 'official' IPMS/USA email that does not come from @myipmsusa.org or @ipmsusa.org email addresses.  It is usually a good idea to check the From: in any email you do not recognise.