A brief post by Laura Atkins on the Word to the Wise blog today reminded me that some versions of Lotus Notes still didn’t support the display of PNG image files in HTML emails. I remember this coming up in our tests a while back, and always wanted to follow it up but never did.
Today I created a quick test email that included both an 8-bit and 24-bit PNG image and ran it through multiple versions of Lotus Notes using our design and spam testing tool. The results weren’t pretty. Turns out that both 8-bit and 24-bit PNG’s are displayed as nothing more than broken images in Notes 6.5.4 and Notes 7. Thankfully, Notes 8 did offer full support.
So, should you use PNG images in your email campaigns? Up until now, that was probably a big no because you never knew how many of your subscribers might be using Notes 6 or 7. Thankfully, our new email client usage reports make that a thing of the past. So, if you’ve checked your most recent campaign and can see little to no Notes 6 or 7 usage, then you’re free to use the often superior PNG format for any images in your campaigns.