My expressdata.mdb file is very large. Can I compact it?

Absolutely. As you generate and send each day, the data file will grow based on how many emails are generated each day. Once you compact the data file, it cleans up old data information. Access saves tons of data that is temporary and not needed. Your data file will compact down nicely to a more manageable size.

FIRST, be sure all your Postmaster windows are closed. Just click the bottom X, under the main X that closes Postmaster in the top right corner. Do this until you see the main white Web page when first opening Postmaster.

NEXT, and only the very first time that you COMPACT AND BACK UP YOUR DATA FILE, go to your Postmaster folder AND Then Copy and Paste Your EXPRESSDATA.MDB file Into Another Folder! The EXPRESSDATA.MDB file is located in the directory that you installed Postmaster Express. By default the directory is in one of two locations: (c:\program files\postmasterexpress\ OR c:\program files(x86)\postmasterexpress\).




Ok, Now You're Ready...

Postmaster Express makes it easy to compact and back up your data file with the click of a button. The COMPACT DATA FILE feature will create a back-up of your data file in the same directory as well.  To compact your data file (EXPRESSDATA.MDB), go to the tools menu item, then click on Database Maintenance.

Once the Database Maintenance screen is up, click on the compact data file button and let Postmaster Express compact the file for you. Once completed, a backup of the un-compacted data file will also be created called Backupmm_dd_yy.mdb in the same default folder!


You should compact and back up your data file AT LEAST ONCE OR TWICE A MONTH. If you send out more than 1000 emails a day, we recommend you compact and back up your data file once every week.