We have Outlook 2010, 2013 and 2016 clients connected to hosted exchange. Every now and then we get a flood of emails through from random addresses where the attachments have already been stripped and replaced with a *orig-filename*.zip.txt or *orig-filename*.pdf.txt file by the host's spam filters.
I have contacted the hosted provider many times to request server side rules to redirect any emails with these attachment types to a quarantine mailbox, or even just add a prefix to the subject line so that we can add client-side rules based on subject, however such requests are always ignored or rejected as not possible.
We have tried using VBA - file attached for reference - however it seems to just stop working after a few days or weeks for reasons unknown.
Is there any other way of achieving specifically this within Outlook, or OWA?
I have found users play around with or disable any obvious third party tools that add a toolbar or extra icons - especially if they perceive Outlook to be slowing down, so would like something unobtrusive! Unfortunately, the anti-virus we use doesn't have an Outlook spam add-in.
Thanks in advance, any advice much appreciated!