Not receiving mails from other mail service providers

Not receiving mails from other mail service providers

I am not able to receive any mail from any of the mail providers other than Zoho, like Gmail, Yahoo etc. I have tried signing in and out of my account multiple times but nothing helped. The mail ID is romi.singla@diabeteazy.com. Kindly resolve the issue asap since I have been missing out on a number of important official mails.