The pictures are still too large. Thank you for your cooperation.
No single image may exceed 550 pixels in width nor 200 pixels in height. The old standard was that all images combined must fit within a single 400x400 square. This was changed earlier this year to the current requirement. If you have a signature developed to the old requirements, you need to fix it to meet the current requirements.
The most common item we find are users with an image that is greater than the allowed 200 pixel maximum height requirement. Be sure you check ALL your images in your signature to be sure none of them exceeds 200 pixels tall.
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3. The TOTAL filespace of all your images combined must not exceed 50KB. (That's 51,200 bytes).
One item we commonly find are uses of animated gifs which can have very large filesizes. If you have an animated gif such as a sparkly signature, or other 'moving' image, be sure you add up all the filesizes for all images. If you have highly detailed photos, it's also easy to exceed the 50KB combined filespace limit.