eDM not sending out when changed sender email (Brand)
The company has a template for brand A. Checked the history there was an eDM sent by sender "brandA.com.hk" successfully two months ago.
I have directly copy that template to fill in new information and target to send, however, no one within the query received this email.
I have tried 3 sender email-address (Brand) , 2 succeeded,
brandA.com.hk << no one received email, no error msg pop up
brandB.com.hk << received email successfully
brandC.com.hk << received email successfully
Is there any solution or where I can look for investigation?

