Additional Support Email Alias Can Not Receive Verification Email

Additional Support Email Alias Can Not Receive Verification Email

Hi I have setup an Support Email Alias addition to my primary email address. I configured email forwarding rule in my gmail account and gmail sent a verification email to the email alias  permassist@evissupport.zohosupport.com

But Zoho never received this verification email and no tick is created for this verification email. Can you help me to have a look? It's urgent.

Thanks