Thanks for reaching out to the Community with your question. We may need some additional information to properly diagnose the issue, but try these two options:
If the above options don't help please send us an email to social_support(at)constantcontact(dot)com, and include answers to the following questions:
If you prefer on the spot troubleshooting please give our Support team a call at 866-289-2101
Hello @kxcicommunity ,
This issue is caused by some email programs reading the image's alt text or name as actual text in your email, and thus including it in an email's inbox previews alongside the subject line and (if included) preheader text. This is most commonly seen when an email has a shorter subject line and an immediate image as the first element of the email. Since this is a standard element of some email programs, it isn't something we're able to control unfortunately, and is prevalent throughout all industries that utilize email communications.
That said, there are a few workaround that can be utilized. You can have longer subject lines, add text to the optional preheader, or include text in your email before the first image (such as a View as Webpage statement / link).