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Data Points missing for some ISPs or browsers in Email Client Monitor

Knowledge Article Number 000214380
Learn why some ISPs or browsers consistently fail to show data points in Email Client Monitor. 
Some ISPs, such as, will alter insecure 'http' URLs. This results in the data points failing to transmit back to Return Path. For this reason, it's recommended you utilize the 'https' version of the pixel in email campaigns.

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