Forgot to mention that you can export the messages to a pg4 file, and upload that file to a groups.io group, and you can read the messages in it in PGO4, or with an SQLite program.?https://sqlitestudio.pl/index.rvt should get you what you need for that.?
Full disclosure, I bought PGO4 when I moved my Metal-Shapers-and-Planers group over here from Yahoo when they started to get seriously dysfunctional. Wilson happed to be a member of my group, and it's come in very handy several times now. He's very responsive to inquiries, though he's in the UK so not on the usual schedule for folks who live in the US. .?
Bill in OKC