When using Amazon's Route 53, it is not possible to setup the SPF as per Zoho instructions:

@ v=spf1 include:zoho.com ~all

It is not possible because Route 53 requires the domain be included as in:

@imodel.com.  v=spf1 include:zoho.com ~all

Because the domain is included as in "@imodel.com.", Zoho will not verify this domain's SPF.

Doe anybody have a work around? Any suggestions?