The new recordset support for Postgres requires transactions and
will cause errors if recordsets are not closed correctly. This
commit fixes problems that were identified during unit tests, and
via some basic code analysis, across all core code. Most of these
are incorrect usage of recordset (forgetting to close them).
Too many lines were being removed for GMail senders. The function was
also removed because it is no longer used, and guessing the client
and cutting accordingly is a poor approach and will probably lead
to issues similar to this one.
