As an ACYM user, it would be ideal if an integration with AcyMailing were avaiable.
The GDPR process will dicate that a 'Join our Newsletter' chooser be offered at checkout and upon confirmed order, the buyer name (First + Second) and email address be added to an existing AcyMailing List, so we also will need to be able to select the list(s) within J2Commerce. It will be the responsibility of AcyMailing to send the correct comms emails to the buy to validate their request to join.