The same thing happened to our email open rates. There were consistent at about 30% for more than a year, then this month of October, the open rate dropped to 15%. It sounds very similar to your issue, as our open rates dropped by 50% when they have alway been very consistent. I thought that maybe constant Contact change there method of measuring open rate because the drop happened over one weeks time. When I was told this, "Many people's email address will change over time. They change jobs, get a new Internet service provider, or change their email address for some other reason, and their old address simply becomes inactive." I thought it was very unlikely for more than 700+ contacts to change over a week period. I have tried cleaning up my bounces, updated my contact list, creating new email templates each week, and optimizing my subject line. I have put in more effort to create emails that attract more engagement. I have noticed a increase in my click rate but my open rate is still around 15%. I was sending the mass emails from separate contact lists, which when I compared the two they had a lot of duplicates. I know Constant Contact will not sent duplicate email out but I wonder if the duplicate contacts were somehow counting as two opens instead of one? Have you had any luck with increasing your open rate after experiencing the drop?
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