I have a problem that bothered me for days, where the domain attachment failed to email messages, and I contacted zoho book support and they sent me to try this example.. here below:

" v=spf1 include:_spf.google.cominclude:sender.zohobooks.com ~all "

But to no avail, I tried all the methods whether multi-record or single-record and the authentication failed. I have dns on cloudflare, and support is slow with zoho I think I rushed to buy a zoho book product I've been stuck since I signed up with them and couldn't apply.