As a practic matter I have 4 or 5 email addresses and can access them on my phone anytime I want. Nothing prevents someone from creating an anonymous email account and writing to another anonymous email account. It’s all likely to come out if the SHTF but if not, it’s business as “unusual”
You can have as many personal emails as you want. But when you’re a government employee, you can’t use personal email to conduct government business — not only is it a security violation, it also is an illegal workaround from the oversight rules.
if you maim them enough they won’t be able to use those cellphones!