I have a Salesforce org. Email address in Org is x[email protected] and domain is a company name hosted on gmail.
When I try to send email(Using apex or standard "Send email" button from objects) to any of the email address of same domain, salesforce shows that email is sent successfully but email is not recieved to recipients. If I send email to gmail hosted email address like xxx.[email protected], it works fine. Emails are recived by recipients.
I have also tested the "Test Deliverability" process in salesforce, same happens here.
Is there any setting which I need to check or set?