Hello @UrbanEngineers ,
Firstly, I'd recommend deleting your recommended-for-removal bounces. These are the bounce types that are the least likely to be valid - either because they're no longer active, incorrectly spelled, or their network have bounced them back in a way that would indicate they cannot deliver it.
You can use segmentation to filter out contacts who've chronically not opened your emails. You can then further manage this segment by adding it to a list, determining which contacts may still be worth keeping (such as very recent additions based on Date Added), and then deleting all the remaining non-openers and the segment list. There's also our pre-built low engagement segmentation, which you can use to re-engage those specific contacts that rarely if ever open your emails.
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