When you do mailing list to send, whether there is such a demand after each email sent is to count how many people read this email. And who has read the messages (IP, location, operating system).
This makes it necessary to insert a counter in the mailing list.
It may be said that inserting a counter code directly will not do. The answer is yes. Because when you look at an HTML letter with Foxmail or Outlook, the JS code inside is not executed. So inserting JS code is unable to achieve statistical function. Inserting the statistic code with <ifram> cannot be performed.
Is there no way to carry it out? Haha, of course there is. Use the tag to do it. As follows:
This will achieve the statistics.
Analysis Reason: Foxmail and Outlook all turn off the JS function. may be to consider the security of the client. Allow only
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