While adding lead, email is not getting validated

Dear Sir/ Madam,

We have been using the Sangam CRM. We are currently facing an issue verifying the Email Addresses in the leads and account modules.

While trying to create a new lead, if the Email is correct, CRM is showing it as invalid for every Email ID.

Kindly help asap. Our CRM URL is - https://viraj.sangamcrm.com/
Contact 7219789784 /3 (10.30AM - 7 PM)
Contact Person Mr. Govind

Just mark it force Valid if email id is valid.