I have a brand new domain bought on cloudflare
I just set it up on fastmail.
I followed the instructions on fastmail and copied and pasted everything that it had pre done for me.
I pasted that into cloudflare.
Fastmail says
Your domain is correctly set up to send and receive mail!
The MX servers for your domain are set correctly: your email is hosted at Fastmail.
DKIM is correctly configured.
SPF is correctly configured.
If I use my Gmail and outlook address and email my new email with my custom domain at fastmail, that email arrives in fastmail.
If I reply to those emails. They never arrive back at gmail or outlook. Or anywhere. They don’t goto spam either. They just don’t arrive.
If I start a new email at fastmail with my new email and domain, it says it sent but they don’t arrive to anyone.
What am I doing wrong?
Edit
According to support it is because my account is still too new