I am not too sure if it is a bug or there is a configuration that I am missing in Nop 3.10.
I have two different stores and created few email addresses for each store in Configuration/Email Accounts.
I have cloned the Message Templates and assigned the Store and the Email Address specific to the store and the message type.
All Messages for any Store are only sent from the Default Email Address and not from the Email Address specified in the Message Template.
I also tried to duplicate the "emailaccountsettings.defaultemailaccountid" to each store and with specific email id, but all email are still sent from the Default Email.
I look at the posting at this
post, but it is not working for me.