I noticed that whenever I send emails from my custom (external) domains through gmail, they are marked as "not secure".
It is because SPF and DKIM are missing.
Now I see we can setup DKIM using G Suite, or even by registering the domain with Google Domains, but neither of these two workarounds is relevant (G Suite is a paid service that I have otherwise no use for, and Google Domains does not support my TLD).
Is there a way to setup SPF/DKIM with my custom domains in "standard" gmail? It is very handy to have everything regrouped inside gmail...
Thank you all!
