Hopefully DBMail is following the normal convention for versioning:
major.minor.bugfix. Any bigfix release should only require dropping in
the new executables at runtime and maybe a restart. (Or for libraries a
bugfix release would mean recompile only, no interface changes.) A
minor release may require a formal upgrade or migration procedure, and a
major release implies heavy design changes.
Assuming DBMail follows this convention, the only kind of allowable
database change in a bugfix release would be something
performance-related that would never require a SQL statement to change
in an application. If installing a bugfix release does cause
application problems, it's a bug in the new release.
--
Will Berry
Co-founder, Second Brain website hosting
http://www.secondbrainhosting.com/