If VPOP3 crashes with a C++ error popup window, that means that an 'exception' has been thrown - something unusual has happened, and VPOP3 doesn't know how to recover automatically.

Often these are due to database errors.

There are two places you can look for the cause of the error:

• EXCEPTIONS.LOG in the VPOP3 installation directory (Note that VPOP3 logs all exceptions here, but it will automatically recover from many of them)
• postgresql-*.log files in the VPOP3\pgsql\data\pg_log directory

• connection limit exceeded for non-superusers