Subscription automated emails not sent

Was it working well before?

YES. As I stated before. It stopped working after my hosting os was upgraded to CENTOS 7.X. My email is working everywhere on the site except for membership pro.

Also, what version of the extension you are using?

1.6.8


I ALREADY EXPLAINED THE ISSUE.
When a user subscribes from the frontend
Administrator receives NO email regarding the New Subscription (And they should)

This is the issue I need resolved.

Thanks,
John

If it works before and now it doesn't work because your hosting provider, it must causes by changes from hosting (mostly related to mail server)

Also, did you try to subscribe as a subscriber and use a different email (than the admin email) to see whether it works?