An email sender is the email address that you will use to send email. In this case you can’t use Gmail, yahoo or Microsoft. This is all because of the changes in Google’s algorithm that uses Gmail, used as email, broadcasting or autoresponder, whereas yahoo and the outlook of Microsoft have outlawed this before Google.
Therefore, we recommend using web-mail with your own domain because it can make your email look more professional as email domain and also can increase the delivery rate or minimize your broadcast email enters as spam.
For more details, please refer to the following video.