hello
the more i familiarize myself with dada mail the more i like it. i strongly suggest to keep it flexible. not all those interested in using dada mail are selling something, nor are they based in the usa. the intended recipients are not in the us as well. there are so many legitimate reasons to use dada mail to inform people about something. many initiatives are run on non-profit basis. the purpose is to spread knowledge, not to make a buck. many people would welcome receiving an email without asking for it and confirming the request. if you give them the option to delete their email in one click (unsubscribe), there is no inconvenience to speak of. double opt-in and double opt-out is too rigid. please keep it flexible. give the owners/administrators the flexibility to make their own judgement of their own situation. give them more options to choose from, not less.

