adobe photoshop - How can I stop Outlook from screwing up images inserted into an HTML email?

(using: Windows 8.1 [running at 125% DPI], Outlook 2013, Exchange 2007 )

Hi

I have a problem getting my graphic designs which I am creating on Outlook emails to come out correctly if I have changed the Window DPI setting to 125% (i.e. 120 DPI).

What happens is the moment that I insert an image into the body of an email in Outlook the image is resized (physically made larger by 25%, by blurring in my case). In some instances this resizing only happens the moment you press Send.

Either way what the recipient sees is an enlarged, blurred image. Nightmare.

At present the ONLY answer seems to be to change the Windows DPI to 96DPI. However one is forced to log out of Windows for this to take effect. However the Windows text on any moderately high res screen is painfully small and I am then soon forced by hurting eyes to change it back again which involves logging out and in again.

I have tried creating images of 120 DPI (difficult but possible) however this does not seem to work.

Gmail is out of the question for several reasons.

I have tried Thunderbird but it too enlarger images when displayed and also the only way to get it to work with Exchange is to install a plugin. I have use ExQillia but that will blow up in 60 days and thereafter it costs $10 which is not acceptable.

If any one knows a way to stop Outlook 2013 from re-sizing please let me know.

Thanks