Attempting to setup and firefox account, part of the process is them wanting me to

verify the zohomail address I've given them. When they send the verification notice it

never shows up at my zoho inbox.  Firefox accounts suggest that I put their address in my contacts.

I added a contact `accounts@firefox.com' which is their From: address.

That did not help.  Their request for me to verify my email address is not showing up.

Is there a spam trap or something I can look at? 

Any other suggestions are welcome