Sometimes when authorising to Donorfy to link to your gmail you may see an error message similar to the one below - to resolve the error click on the Advanced link
(If you do not see the Advanced link, then see GSuite Security note below)
Next click on Go to donorfy.com
Click on the Allow button, you will then be returned to Donorfy and your email will be setup
If you do not see the Advanced link from the authorisation box in the first step, then this may be because you are not the account administrator for your organisations GSuite.
Access will instead be needed to be re-granted from within your GSuite by your account administrator -
They can do this in your organisations GSuite via:
Admin Console > Security > App Access Control > Manage third party app Access
There will then be the option to configure a new app. Search for Donorfy and then grant access.
Re-open the Email Server Settings is Donorfy and then re-follow the setup process for GMail.