Creating SPF record for multiple subdomains

Hello -
I am looking for some guidance on creating an SPF record for my organization.

I have 29 email subdomains, all pointing to a single Google Workspaces account.

mydomain.com
a.mydomain.com
b.mydomain.com,. etc.

Can anyone share the syntax that I would use to do this?

Thanks!

SPF uses TXT records. It’s up to your mail host to provide the proper SPF syntax, or check some place like serverfault.com for mail admin support. But here are instructions on working with Cloudflare DNS:

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Thanks -
What I am really looking for is the correct syntax for an SPF record using Google servers and
several email sub domains -
If anyone has a working example to share, I’d greatly appreciate it.

I’m new to DNS and CloudFlare.

TIA -

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