gmail on my phone.

I have an Atrix HD phone.  It is new to me.  It required a gmail address so I set one up specifically for the phone.  I prefer to use Outllook.com for my email and wanted it to remain untouched on my desktop.  Evidently now gmail has somehow synched my Outlook account because all my emails are on my phone for the last three days.  Do I have to let this happen?  If not, how do I get my messages back.  Thank you and I will keep checking for answers.  Also this is the first "smartphone" I have had ad am not familiar with it at all.  I use H2O as my service provider and they are zero help.  I am also trying to check with Motorola, but no luck yet.

Any help will be very much appreciated!