I want to use a domain just to use as an email proxy when registering for newsletters and other sites. I only want it to be one-way. I also want to use subdomains for grouping of use case, so that i have the following setup.
MX Records (Cloudflare)
i have setup a catch all email routing for the domain
proxydomain.com and forwarded it to
I have also added
newsletters.proxydomain.com and added the MX for it the same as
Additionally, i have setup the DMARC to reject all fails.
TXT_dmarcv=DMARC1; p=reject; rua=mailto:[email protected]
Is this a valid setup, can i continue using it and can i register more subdomains as required ?