[Macha]

For a while I had a thunderbird filter to automate forwarding based on our provider's email header.

They disabled SMTP and the Gmail web client has no such ability to filter on arbitrary email headers.

[ohthatsnotright]

You can setup a Google app automation to do this for you.

I did for e.g. knowbe4 since all their test emails have the same header information. It made it quite easy to never see any of their attempts, though I did have to check every once in a while to see if I'd been signed up for any random learning and it removed those emails as well..

[Macha]

iirc, the same company had locked down the allowed oauth apps, so you would have needed an exception from security to run one.

I doubt they'd have granted an exception to stop getting annoyed by their own training.