Is it possible to set MX records to receive emails in Google App Engine?

Question

I have created a receiving email app with Google App Engine using the doc (https://cloud.google.com/appengine/docs/standard/python/mail/receiving-mail-with-mail-api).

I want to receive emails using my custom domain. What should be mx settings? Can anyone help me? Thanks in advance.

Answer 1

I have never configured MX records for App Engine. However, Internet mail does not know or care about App Engine.

Your MX record will look like this:

Type: MX
TTL: 86400
Preference: 10
mail server: Public IP address of your instance or the domain name.

Answer 2

email forwarding is a feature of registars and mail servers, you cannot set this up in GCP without having setup a mail server first. If you use the free Gmail service to manage emails, check this tutorial on how to proceed with some known registrar.