Opened any email in last 1 year - filter for email sends

[avaroglu]

We use a filter on our email sends for "opened any email in the last 1 year" to help with deliverability. However, I've noticed our email send list has drastically lessened since I started over the last 2 years - wondering if anyone else uses this filter for deliverability purposes or is there harm in removing for the next email send just to test how that goes OR would having a lower deliverability rate greatly impact us? Thanks!

[SanfordWhiteman]

Not sending to people who don’t open means you’re not sending to people who use Outlook + don’t deliberately enable images, but who may be otherwise engaging with your emails.

This really isn’t a practical filter in most B2B environments and I wonder how you came up with it as a proxy for engagement.