Can't eliminate an early version of mail

Question

On my office machine during indexing mail would always crash when it got to a certain email.
I tried trashing old emails, but they wouldn't delete. I apparently trashed a couple folders of emails but they reappeared.
We were about to update from 10.2.8 to Tiger so I trashed the mail app, did a search on "mail" and trashed (and always emptied trash before moving on) those folders.
Installed Tiger, opened mail 2 and the first thing it did was begin importing all those trashed emails for somewhere. It would crash when getting to that same email (number 1729 if that means anything).
I think 1729 is Evil.
BobMc

Answer 1

The Mail.app stores no data.
All Mail.app account, user created and any imported mailboxes are stored in the Mail folder at Home > Library > Mail.
The Mail.app preference file which stores all account information and general Mail.app preference settings is located at Home > Library > Preferences > com.apple.mail.plist.
Deleting the Mail application does not delete the Mail folder or Mail.app preference file and it sounds like you did not delete the Mail folder at Home > Library > Mail before installing Tiger.
With the Mail.app quit and using the Finder, go to Home > Library > Mail. Move the Mail folder to the Desktop.
Launch Mail and a new Mail folder and account named folders within (one for each email account created and accessed with the Mail.app) will be re-created with no messages.
This will also eliminate any Signatures, Rules and Junk Mail "learned" settings available with Jaguar Mail.
If you don't need or want to access any of the messages or Mail.app settings available with Jaguar Mail, you can delete the Mail folder moved to the Desktop.