[quote user="bkngbl"]My problem is similar to the msg by rafi on 6\22\2010.[/quote]

It would have been easier to look up if you had provided a link to the respective thread, so one doesn't have to search for it. Here's another post providing possible solutions.

My problem is similar to the msg by rafi on 6\22\2010. This all started with trying to send a too large msg.

After the program failed to open I tried moving the mailbox to a new location. That did not help.

Then I upgraded to 4.52. This did not help.

Then I installed pmail in a new folder. Pmail now opens with a default mailbox. When I try to open with the old mailbox, the program crashes every time. I tried moving the mailbox within the program and with mbxmaint.

  I could not find the new mail folder in windows explorer to remove cnm files as recommended and I can't get the mailbox open with pmail. I did not find any recent cnm files but I moved about 8 files anyway.