add coinpliance.us to smtp permission list
bitpay uses a host of 3rd parties for their services, zendesk and coinpliance.us.
Our mail server is correctly rejecting emails from coinpliance.us because it's not a valid mail server:
Will retry in 3600 seconds: no-reply@bitpay.com → donations@torproject.org 'Bitpay Account Verification document upload information' Server response: 450 4.1.7
+<bounce+e022f7.37af6-donations=torproject.org@coinpliance.us>: Sender address rejected: unverified address: connect to coinpliance.us[198.61.225.231]:25: Connection refused
and further
coinpliance.us has no MX record