I'm certainly not saying it's right - but it works.
Gmail's spam filter (and promotions filter) works with >99% reliability as a user, with really trivial numbers of false positives.
Gmail's spam filter (and promotions filter) works with >99% reliability as a user, with really trivial numbers of false positives.
Customer requests for quotes, Paypal/Stripe security messages, lots of other important emails go to spam.
See e.g. https://github.com/nh2/gmail-spamfilters-paypal-security-mes...
For a while now I suspect that GMail has some bug with its own group email addresses:
When somebody sends an email to our GMail group email address team@example.com, it shows up in GMail as "Sombody via team@example.com". Of course, teamexample.com receives both spam and non-spam.
I suspect that when we mark spam that comes "via team@example.com", GMail learns that as "things 'via team@example.com' are often Spam", even though info@example.com is a Google Groups email.
And by now, everything that comes 'via team@example.com' is marked as Spam.
So it seems that when we mark an email that arrived at team@example.com as Spam, Google punishes its own Group email address, instead of the sender.
It's Google's own group of my own org. Does it make sense that the spam button would punish my group own email?
Also, if I mark it spam in the Groups interface, it's still polluting the inboxes of all my team members where it has already arrived, right?
I'd have to tell my team to never use the spam button on obviously spam emails. That doesn't make sense for a business email product!
at this point maybe you should just create a filter rule