I don't know how many soft bounces it takes to equal a hard bounce - I think that's logic that needs to be added in by the user (you and me). But I did find this thread that looks to be a good resource.
Marketo doesn't. Hard bounces and soft bounces are different events that happen for different reasons, and no amount of soft bounces will automatically mark an email as invalid. Only a category 2 hard bounce will mark a record as invalid automatically.
Correct. They are totally different concepts.
What you may have heard is that some of us setup a system where:
- One Hard Bounce is invalidated
- 3 or more Soft Bounces in 30 days might get suspended or Invalidated
but these are flows YOU setup....not Marketo.