I'm trying to create a credential harvesting campaign but it doesn't let me to se select users with personal gmail accounts.
I've tried sending the same campaing to personal outlook/hotmail accounts and there's been no problem.
Is there a reason why this is happening?
As Badrobot said, you must add the Gmail's servers IP addresses to the allow list. That IPs are:
Here you can find the complete info: https://support.sophos.com/support/s/article/KB-000037983?language=en_US
Regards from Mexico!