Zoho mail server doesn't received emails that are submitted from a website using PHP mail() function.  

I contacted customer support and they are suggesting to add SFP records for each domain from where email is submitted. If 1 lacs of user (from different domains) are sending me an email ...I need to add records of all those 1lacs of domains in my SPF records. What a rubbish solution????? Is this really possible and how do I know who are going to send me an email ????

It means I am loosing many emails  which I even don't know ....Other than gmail, yahoomail, hotmail ...some of the know domains ...they blocked everything....

SO GUYS BE CAREFULL ....THEY ARE CHAETING US!!! ..... I AM QUITING ZOHO ... YOU ALSO RE-THINK ONCE

NEW CUSTOMER NVER EVER  USE ZOHO SERVICES!!!!