To process a Gmail account that has 2-step authentication, you will need to first temporarily allow less secure apps access. You'll then have to set up an application-specific password for Aid4Mail.
You may also need to complete a captcha in order for Aid4Mail to access your account. You can complete the captcha here: https://www.google.com/accounts/DisplayUnlockCaptcha
If you experience any issues, please don't hesitate to contact us by raising a ticket.
If you would like to buy an Aid4Mail license, visit the Aid4Mail website.