Mautic not delivering

My mautic stopped delivering maills to gmail and other mail providers, it delivers to my roundcube mail hosted on same VPS as my mautic. Any assistance to solving this one will be greatly appreciated.

What version of mautic are you using?

See this: 2024 Feb. email regulations – the Mautic angle – Joey Keller

I use mautic 5.0 release version