In the newsletters of our customer Pentair we make use of .png images so the images have a transparent background.
When we sent the newsletter we see that the images get a grey background in some emailclients and when you choose to view the email in the browser.
I have added some screenshots to show the problem.
- Gmail – no problem > images have no background
- Outlook app – no problem > images have no background
- Hotmail (outlook mail live) > images have a grey background
- View email in browser > images have a grey background