Notification to Gmail not working

Hi

I’m using Mailpoet on WordPress.

Problem 1:
I have activated notification for new subscribers.
– The reception adress for these notifications is a Gmail account.
– And the notification email is sent from my server email adress like: [email protected]

But I don’t receive ANY notification on my Gmail account. I replaced this adress with yahoo and other personnal adress it worked fine but not for Gmail.

Problem 2:
I also tested the Test email button using PhP Mail. The test email is sent to a Gmail account and again I don’t receive the test email (it is written it was sent). When I test it with my Yahoo mail I got the test email.

Why I can’t receive any notification or email to my gmail adress while it works with Yahoo and other email adresses ? Of course I checked spam and other folders.
All email were sent using my own domain email.

Thanks

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