DKIM and SPF verification failing unpredictably

DKIM and SPF verification failing unpredictably

Hello zoho,
I have setup DKIM and SPF records for following domains - 
1. voicedailydeals.co.uk
2. mithramedia.com
3. igniteutility.co.uk
4. radicalstack.com

Apart from SPF record for igniteutility.co.uk and DKIM record for radicalstack.com, all other verifications are failing on zoho.
I have verified DKIM record and SPF record for all the domains using these 3rd party tools - 
1. For DKIM -  http://mxtoolbox.com/dkim.aspx
2. For SPF -  http://www.kitterman.com/spf/validate.html

Please take a look as quickly as possible and let us know if there is a misconfiguration on our part.