You can use MSCONFIG to keep Outlook from starting at boot time, if it's doing that. If you have it running for whatever reason, X it out before running Mailwasher, then start it back. I assume you're aware that you can set up rules in Outlook to filter out most of the junk too.
Good luck.
I use Mailwasher Plus (MP) to preview my email. I don't want them to be read into Microsoft Outlook 2010 until I have deleted all the junk off the server which MP does. Where is the default to prevent the automatic read in Outlook 2010 mail so that I can screen them in MP first.
When they have been screened by MP (deleted from the server) I will click on the "Send/Receive All Folders" when I want to see them.
Changing the email address or other account configuration is an unacceptable solution as I have seven accounts.

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