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22 hours agoThe difference is that the alias provider or destination email provider can associate all your accounts with your identity. I do not want to give this ability to either the alias provider or the email provider. It is a different threat model. (Please correct if I am wrong)
I did not say how many different accounts I have, but you can assume my separation of accounts is sufficient for my needs.
I’m having a hard time finding how to access about:profiles, but in looking for this I found you can disable the “download messages on startup” option. Maybe Thunderbird is the solution. It will require some more investigation, but this is giving me hope.