All my automated sales emails (like order confirmation, shipment...etc ) are sent from firstname.lastname@example.org,
I want emails to be sent from my Magento domain exemple: email@example.com
You can configure them at :
Store > Settings > Configuration > Sales > Sales Email
It looks like more people have this problem:
Temp solution add this to your php.ini (I checked this now and its works for me)
sendmail_path= "/usr/sbin/sendmail -f firstname.lastname@example.org -F 'Your SHOP <email@example.com>' -t
or disable amazon pay.