warrenski
Specialised conversion/migration software is probably the better route to go, especially now that the Eudora source code was donated to the Computer History Museum. I'll give Eudora2Unix a shot though!
You mentioned attachment name clashes: Eudora simply appends an incrementing integer to the incoming attachment's filename, for example, it would retain file.jpg for the first email and use file1.jpg in the next email it encounters.
One bank here recently introduced a duress-PIN, which when entered, will commence monitoring and send help, but they still don't offer any guarantee of a refund. Another bank allows you to change their app's icon and name, in an effort to masquerade as something less recognisable.
I'd much rather delete the apps, unlink my devices from my bank accounts and use a TOTP authenticator app instead.
I believe Bud Colligan may have been speaking about ActionScript in this quote, the scripting language found in their yet to be launched Macromedia Flash product. Of course, Flash is no more... and neither is Macromedia. Time flies!
There's hope that the HERMES Mail project, which was formed after the Eudora source code was release, will one day be a viable replacement:
Section 4 states that auto-responders should send the response to the email address given by the Return-Path header (usually set to a VERP address for identification of bounces) or if absent then fall back to the email address given in the From header.