Hello so recently i installed MyBB into google cloud and users are reporting that they arent getting email so how can i fix this?
Google Cloud Platform doesn't allow SMTP traffic through default ports: 25, 465, 587. However, you can use Mandrill to send emails through SMTP and it provides the port 2525 through TLS, which is not blocked by Google Cloud.
You can find this info in https://wiki.bitnami.com/Google_Cloud_Platform/Servers#How_to_configure_the_email_settings_of_your_application
I hope this helps.