Dead Man's Switch
A "Dead Man's Switch" allows users to be contacted automatically once per month (per week, per year etc) to confirm they are still alive. If (for whatever reason), the user does not reply and thus provide "proof of life," the "Dead Man's Switch is activated.
This involves sending one or more emails out to designated addresses with instructions. It's a sort simple will, but one triggered digitally instead of by a person.
Prontonmail's anonymity suits this type of feature well because hosting one's will on Gmail is akin to sky writing it over Langley, Virginia. LOL!
People can be sick för years ...
Maybe every fifth years
Roxy Heart commented
I don't know why this isn't a common feature for just about everything. Aside from a few philosophical articles on 'mortality in the digital age', nobody's really trying to put this in the hands of users. Sure, family or an authority can notify a social network if someone dies, but it's weird not to be able to maintain it all yourself. Imagine a dissident blog that launches 'I am kidnapped. I have been gone over 7 days.' messages. ProtonMail has the chance to lead the industry and pioneer us away from the dark ages.
F 'n Me commented
I have 'googled' for similar services, but have not been able to find a workable solution (IfIDie.org, deadman.io and deadmanswitch.net appear to be questionable/unreliable/unsecured). Forget gmail..!!
I am looking for a solution to ensure my canine companion is taken care of in case of 'the unexpected'. For this requirement, I need to have a daily acknowledgement option. I am about to go into retirement and it is often weeks/months between contact with folks who might be concerned.
An additional function, being able to set up emails with relevant documents; timeline would be on the order of days/weeks/months (as opposed to daily ack for canine well being).
As PMail is something I use daily, it is the perfect tool for this function. An 'acknowledge' or 'check-in' button in the left column (or on top menu bar) that appears if a user turns on the feature, would be the vehicle to allow the user to indicate that 'I am still alive'. Another possibility would be SMS reply.