Hi,

There is a free module for validating the email in Odoo store, the module is of v10. See: Validate E-mail ID

Either you can use the module as such or refer the code and see how it is done. From the index file of the above module, you can see the python packages used for the module, you can try directly using those python packages also.

Python Packages:  validate_email and pyDNS

Thanks

Try regular expression in email field like:

regex = '^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$'V

else raise Validation Error in py