While maintaining huge focus on opt-in communications it is easy to drop the ball when people leave a company.
Can anyone recommend any services that can look at soft bouncebacks and properly categorise them? Ensuring we can keep on top of people moving roles or jobs?
We are using Siftrock - Siftrock | Email Reply Management for Marketing Automation - to interpret automated email responses. They can detect the "Left Company" case very well, categorize it, and then send that status to Marketo. A Marketo Smart Campaign can then handle the sync to your CRM, the unsubscription or whatever you want to do with these records.
I guess this doesn't really answer your question, as we remove these addresses before they bounce, but I think that's even better.