When you send a newsletter through any email marketing service provider using a
From email address that ends in
@yahoo.com, you’re considered as “impersonating” Yahoo!… even if you’re the legitimate owner of that email address.
Yahoo! and AOL have asked receivers to reject any email that aren’t sent through their own email client or by their employees, causing the emails you send to bounce.
Other free webmail addresses might redirect emails that are not sent from their employees to the SPAM and Junk folders.
Use your domain
You will improve your email deliverability by using an email address with a domain that you own.
Make sure you authenticate your email address in order to prove that you’re the legitimate owner of the domain.