If you are attempting to connect your inbox to Warmup Inbox and you have 2 Factor authorization enabled, you will need to create an App Password in order to connect to the platform. Lets go over how to do this.
1. Confirm That Your Google Workplace Account Has 2 Factor Enabled
To confirm that 2 factor is enabled under your account, login to your Gmail inbox and navigate to your inbox settings
Then navigate to your Google account settings.
Then click into Security
This will bring you to an overview page for what security settings you have enabled under your account. If 2-Factor shows up here, than it is enabled (Note, ignore the yellow ! as Google prefers that you setup 2 factor with a backup phone number.)
Once you have confirmed that 2 factor is enabled under your account, proceed to the next step.
2. Allow Per-User Outbound Gateways
Once you are ready, navigate to this link and enable allowing users to send mail through an external SMTP server as seem below.
Make sure you save your settings and then move onto creating an App Password.
3. Create an App Password
Once you have confirmed that 2 factor is enabled as well as Outbound Gateways, navigate back to your Google Account Settings page and click into the Security tab.
Once there, scroll down a little bit and click into the "App Passwords" section
Once you click through, click into "Select Device" and select "Other". Name this password whatever you want (We recommend naming it "Warmup Inbox" for future reference)
Once you name the app password, click "Generate"
If done successfully you will be greeted by a page displaying your App password.
Be sure to save this password as you will need it to connect your inbox to the platform. From here, proceed to sync your account as you normally would while replacing your normal inbox password with the App generated password.