By adding MX records, you are providing Vercel with the instructions for where to send email sent to your domain. Your domain registrar will be able to provide you with a list of records that need to be added.
You can use the DNS UI to add a preset for common mail services.
If your email provider is not in the list of presets, you can proceed to next section where we will discuss adding records manually.
While the DNS UI does have a preset for G Suite, it will serve as an example in this article. You can consult the documentation for G Suite here
You will likely need to repeat this step multiple times, depending on the number of records your provider requires you to add.
In this case, the TXT should be in the root domain and that is why the
'name' field is empty. You need to check the required arguments with your mail provider.