Not receiving emails following transfer from 1&1

Not receiving emails following transfer from 1&1

Hello

I transferred my hosting from 1&1 to Zoho, following all the instructions.  All worked fine for a few months, but then suddenly stopped working and I have the following notifications:

'DKIM entries in your domains DNS are not configured to match with Zoho. Configure DKIM for better email deliverability.'

'SPF entries in your domains DNS are not configured to match with Zoho. Configure SPF to for better email deliverability.'

'The MX Records of your domain(s) sustainabilitypractice.co.uk are not pointed to Zoho and you may not receive emails in Zoho'

Once I switched to Zoho and everything was working I closed my 1&1 account, so unable to login there to do anything.

Any help would be appreciated.

Thanks