Standing instruction
Every email we send runs on an instruction you can rewrite
Stop everything, or keep something lighter. Both are one form, neither asks you to explain yourself, and either one is saved the moment you send it.
If the reason was us
Most people who leave a list leave because it was the wrong list, not because they were the wrong person. If something we sent was wrong for your firm, one line in the notes box above changes what we write next.