html - Is there any way to track whether an email has been opened? -


I am starting to work on mailing list software which we internally (edit: Formally send email, so we can not enforce policy on mail clients) . Do I have a way to find out that when I send an email to a particular user, then the email has been marked as junk or opened as a protest against the deletion?

I thought that the simplest approach was to provide a one-pixel custom image that would need to be loaded from our server, but many mail clients block this approach. Is the attitude?

The mail client blocks all these types of attempts too much. The best idea is that they An image can be given that they want to see if they read messages, and so they want to display pictures in their mail client.


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