Problem: Using Easy WP SMTP , while the configure set up is right it still can not send an email via the “From Email Address”
My case is because of SELinux again.
You can check whether SElinux allow the server to send email:
getsebool httpd_can_sendmail
Solution: ssh your server and enter below command to allow server to send mail:
sudo setsebool -P httpd_can_sendmail 1