Issue Description
The exact distinction between the "Email Bounces" and "Email Bounces Soft" filter and trigger is unclear.
Issue Resolution
The “Email Bounces” trigger or filter will look only at hard bounces, where Marketo received a definitive "No" from the target server. The “Email Bounces Soft” trigger or filter only looks at soft bounces, which occur when we are unable to deliver the email, but did not receive a rejection from the target server. You can use both filters with "OR" logic in order to look at all bounces.