RE: Internal Error: the email is still syncing. Please Try again later
Hi VSalyer,
As you have mentioned, this issue could be caused by Sender(actually "From address"?) field.
Marketing email has its own back-end engine to send email compared with activity email,
so we don't need to make the field is populated with email adress of an existing user in org.
Instead, we should make sure that the domain(string after @) in the field has been authenticated in Settings > Authenticated domains to send marketing email.
For example,
if clofly.com had been authticated,
then you could send marketing email with following settings:
From address: admin@clofly.com, aaa@clofly.com or xxx@clofly.com
From name: it could be any text value, e.g: clofly, clofly admin etc.
Finally, try to change a working email address(authenticated domain) to send email with the template again to test whether the issue could be solved.
Regards,
Clofly
