And I use the feature of turning off macros in opening an unknown WORD document. So-called firewalls are tricky to administer and keep current. One client office uses a stand-alone PC for Internet access, Their financial PC's are isolated from it. An alternative to transmitting complex files as attachments is to post them on a webpage. Be careful out there, and practice safe computing.
Viruses are much more in the news, and attachments to email are out of favor.
Besides the nuisance of figuring out who really can read your format of attachment, some corporate policies are to not open any of them. A smarter technique is to post your attachment as a webpage. Many more people have web access than can open any attachment. I watched ABC television live coverage of 2000 sweeping across the planet. I saw a native celebration on a South Sea Island, followed by fireworks in New Zealand.