I just noticed on an associate's computer that an email with an image I had just sent her had "Display images below" as a link at the top of the email. Clicking it would allow the pictures in the email to appear.
This is a setting in each Gmail users Settings that can be turned on:
I allow external images to be displayed so I see the images just fine.
Okay, thanks guys! This has NEVER happened before and i'm trying to figure out why! All images load fine within my gmail (from other people / businesses) account accept the emails i'm sending myself from Marketo. Something weird is happneing. I'll have to contact marketo about it.
I just had this issue. Check the size of the image in Marketo - is it large? Try using an image editing program like Photoshop to reduce the size of the image, then reload into Marketo and see if it loads correctly in Gmail. That solved the problem for me.