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Spam Resource: Do image-only emails harm deliverability?
Al Iverson just shared a new interesting blog on Spam Resource:
This is a question that I get asked often: If somebody sends an email message that is 100% images, does that design choice itself make the message more likely to get relegated to the spam folder? My short answer is no, not really, but it merits a discussion, so let’s dive into it a little bit deeper.First, let’s get this bit out of the way — YES, some spam filters will score emails higher (more spammy) if the image-to-text ratio is low – meaning that a message contains little text, but is chock full of images. SpamAssassin is an example of a filter that will note this in its filtering results. But while SpamAssassin can be good for “broad strokes” guidance for email senders, this is an example case where SpamAssassin’s filters give different results compared to the spam filtering engines of the biggest ISPs and mailbox providers like Gmail
More here: Do image-only emails harm deliverability?
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