We are facing bounce-back messages from the email service that uses our domain name

We are facing bounce-back messages from the email service that uses our domain name.

Our domain is managed by the Cloudflare platform, and for email services, we are using Inmotion Hosting, and in addition, we use Paubox.

we added TXT value with below that entry in Cloudflare DNS for our domain.
v=spf1 +mx +a +ip4:173.231.220.231 +include:_spf.paubox.com ~all

but then also we facing email bounces-back frequently.

Welcome to the Cloudflare Community. :logodrop:

What is your domain name?

Do you have any published DKIM records or a published DMARC policy?

What error messages do the NDRs (bounces) contain?

Our domain name is - “zoobooksystems.com”.

yes we set up DKIM & DMARC both records.

DMARC record :-
Name: _dmarc.zoobooksystems.com.
v=DMARC1;p=quarantine;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400

DKIM record : -
Name: default._domainkey.zoobooksystems.com.
value : Value: v=DKIM1; k=rsa; p=<…key value…>;

How about this question?

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