Nobody's job title is "keeper of the list"

You run the parents' network on top of your real job. The membership list is a spreadsheet a predecessor started, half the people have moved teams, and you find out someone left when the email bounces.

One link in your Teams channel. People add themselves, pick which sites and topics they care about, and correct their own details when they move.

The chair changes every two years and the list has to survive it. Because people maintain their own row, the handover is a login rather than a spreadsheet nobody understands, and the record of who agreed to be on it comes with it.

Finance wants the monthly update, but only some of Finance. You keep the list by hand, and every reorganisation makes it a little more wrong.

Everyone picks their own topics. When they change teams they change their answer, and your list is right without you touching it.

The list stops being a snapshot of the last reorganisation. When somebody moves from Finance to Operations they change one answer, and the next send is right without anybody auditing it.

A car park closure at Leeds does not need to reach Bristol. Sending to everyone teaches people to ignore you, which is the thing you cannot afford in a real incident.

People say which site they work at. You send to a site, not to everyone, and the messages that matter keep their weight.

Car park closures reach the people who park. Fire-drill notices reach the building. The messages that must not be ignored keep their weight, because nothing else is sent to everyone.

Your membership list cannot sit in the company CRM, and it should not live in one person's Outlook contacts either.

A list you own, with a record of who agreed to what and when, and a way for members to leave without asking you to remove them.

A membership list is not the company's to hold, and it should not be one person's Outlook contacts either. Every record here carries the moment its owner agreed to it, and they can take it back without asking a rep.

You mail everyone about the bake sale because you have no way of knowing who wants to hear about it. The people who do not, quietly filter you.

People opt in to what interests them. Fewer emails, read by more of the people who wanted them.

Committees turn over constantly and enthusiasm is the only budget. Asking once, and letting people change their answer later, is the difference between a list that grows and one that gets quietly filtered.

Their work address dies the day they go, and there is nowhere for a personal one to live that is not a spreadsheet on somebody's desktop.

Leavers update their own contact details from a link they keep. The relationship survives the offboarding process.

Their work address dies on their last day, which is exactly when the relationship becomes worth keeping. A link they can use afterwards costs nothing and is the only thing that survives offboarding.