Got a gmail @ work account set to own domain name and have been trying…

Incoming Mail (IMAP) Server
imap.gmail.com

Requires SSL: Yes

Port: 993

Outgoing Mail (SMTP) Server
smtp.gmail.com

Requires SSL: Yes

Requires TLS: Yes (if available)

Requires Authentication: Yes

Port for SSL: 465

Port for TLS/STARTTLS: 587

Try to create App Password under Account Settings, Security –> https://myaccount.google.com/apppasswords And use it instead of your normal password, it will solve the 2 Factor Auth issue at least.