How Email Content May be Killing Your Deliverability

"If putting an image in your email causes it to go to spam, that is not your only problem. Images don't automatically send your emails to the spam folder, but poorly optimized ones can hurt your email program's inbox performance and engagement rates. The issue isn't the inclusion of images but how they're implemented, including file size, alt text, and overall email composition."

"Mailbox providers are relentlessly raising the bar for email marketers. They're no longer just asking, 'Is this sender authenticated?' Instead, the question has become, 'Does this message deserve to be in this subscriber's inbox?' This shift reflects how AI-driven mailboxes and snippet digest views mean that email content optimization is back to the forefront of the conversation."

"Broken or sketchy links instantly damage trust. Spam filters actively check your URLs, and broken links, unsecured pages, or generic shorteners can make your email look suspicious. Even with proper authentication and consent processes established, link quality directly influences whether mailbox providers consider your message trustworthy enough for inbox placement."

Mailbox providers now evaluate whether emails deserve inbox placement beyond authentication checks. AI-driven mailboxes and snippet views make content optimization critical for deliverability success. Common content issues sabotage campaigns: poorly optimized images with missing alt text, broken or suspicious links using generic shorteners, and irrelevant content causing low engagement signals. Even with proper authentication and consent processes, poor content quality signals to mailbox providers that messages don't belong in inboxes. Images themselves aren't problematic, but oversized files and image-only emails create poor user experiences. Broken links and unsecured pages damage trust and trigger spam filter scrutiny. Relevance remains essential—perfectly tested emails fail without resonating with subscribers.

Read at Litmus