All Pixelfed servers on version 0.12.3 or earlier have already been suspended for all toot.wales members - and we have re-connected to a small number that have updated in the past week.
We will review the unpatched servers after 28 days of the updated version being available, and will likely suspend any remaining unpatched servers for all members at that time.
The above guidance is for private accounts that need to take precautions before we enact service-wide suspensions.