I have a few general questions:
When the sending address is deleted does that mean the vendor can't see it too?
When opening a dispute with an unresponsive vendor is the site admin also aware of this? or do you need to click "escalate dispute".
Is there a penalty for escalating a dispute?
Thank you.
I don't have any experience with BSM, so I can't help answer any of these questions, unfortunately.
However, BlueSky has its' own subreddit - maybe someone there could help you.
I also recommend sending your questions to BSM's support.
I hope you get the answers you need! I apologize for probably telling you things you already knew, but I noticed there were no replies to this post at all, so I figured I'd at least tell you what little I know. :) Good luck!