Gmail will disable access to unsecure programs

[ts678]

Free SMTP - Gmail alternative might be a solution that uses a different email sending service.

@j365

is this the end for Gmail-linked email notifications?

but if you want to send through Gmail, you could see if App Password as below works for you:

@ts678

Did you happen to test if the App Password that Google mentions works?
It might need 2-Step Verification, but Google has been pushing that out…