Sometimes a campaign shows delivered but subscribers don’t receive the email. This can happen even when your email service reports successful delivery. Understanding why this occurs helps ensure better deliverability and accurate campaign tracking
One common reason involves subscribers using strict security settings, like .edu or .gov domains. These security systems often preload links and images in your email to check for spam or malicious content. As a result, the campaign may show as delivered or even “opened,” but the subscriber never actually sees it.
You can verify this behavior by inserting a hidden link in your campaign. If the link registers a click without the recipient opening the email, it indicates the spam filter triggered automatic activity.
If your audience frequently uses strict domains (such as .edu, .gov, etc.), we recommend asking them to provide their personal email addresses when they subscribe for newsletter/email campaign. If you use online forms to collect subscribers, you could add text suggesting that subscribers use their personal email addresses instead of their business email addresses.