How do I create a GDPR compliant email marketing process with Vtiger?

To make your email marketing process GDPR compliant, you must do the following:

• Request double opt-in from all your contacts
• Change the Email Opt-In field in Contacts value to ‘None’ from ‘Single opt-in’ for all your contacts in the EU, or who you are not aware of the location
• Add the email opt-in checkbox in your webforms