Image Suppression: How it Hurts Your Efforts and Depresses Your Deliverability
In the final post in a 3-part series (see first and second) written by our partners at Return Path, Dan Deneweth continues the discussion on issues affecting email deliverability. Want more deliverability information? You can check out their blog, the Email Marketing Water Cooler and sign up for real-time alerts when new content is published.
Spammers have negatively influenced email in lots of ways, with one of the most visible being the need for image suppression. There is no question that the average consumer prefers pretty, graphically-enhanced email over the boring, plain text versions. But there is also no question that the average consumer prefers that pictures with "adult" themes don't accidentally pop up while at the office or in front of impressionable kids. The ISPs have combated this problem by suppressing graphics — essentially treating all images as potentially problematic. (Thank you, Mr. Spam.) Despite how widespread this practice has become, few marketers really think about how image suppression affects their email program. They should. Why? Four reasons:
- Image suppression messes up your tracking: Open rates are calculated when an invisible graphic pings your servers. No graphic, no ping, no open. Data from DoubleClick and others suggests that an overall decline in open rates is due to the rise in image suppression. Knowing this when analyzing your data is important.
- Image suppression can make your email unreadable: Depending on how your email is designed, your message without images might look very bad or it might be completely unintelligible. Through the design process consider what the email will look like without graphics. You may not be able to make it look great, but you can at least make it readable.
- Image suppression limits your response rates: When someone can't see your email, or read your email, they are less likely to interact with it. How much money do you leave on the table because your best offer is in a graphic that doesn't display?
- Image suppression can hurt deliverability: When subscribers don’t recognize an email because images are blocked, they may inadvertently mark it as spam. Also, the lack of responses (reason #3) and tracking (reason #2) can lead to poor marketing decisions, hurting the relevance and value of your program.
Our recommendation is to design for life without images. You can design a very attractive HTML message with no images at all. Most importantly, don’t use images in place of text. Instead, think of images as the spice in your message – a little bit goes a long way. It’s also crucial to use a safety link at the top of your message include hyperlinked copy that says, “Can’t read this email? Click here to view in your browser.”
Spend a little time on your email design and you can create great messages that will be readable in a variety of environments.
Dan Deneweth, Sr. Director, Sender Score Product Management, Return Path



