I keep sending letters, but I don't know if the subscriber read them. Is there a way I can check it?

The Sender Pro functionality supports the notification that the subscriber has read the letter. For this purpose, an option to add a specific 1×1 pixel image to the text of the letter is included. This function is available when sending a message in the HTML format.
In order to enable the option to send letters with notification, you have to follow these steps:

  1. Go to plugin settings (Dashboard -> BWS Panel -> Sender Pro).
  2. Make sure that “Email in HTML format sending” and “Send email with confirmation” options are enabled.
  3. Save the settings if necessary.

Warning! Due to security policy peculiarities, receiving a notification that the subscriber has read your letter may be impossible with some mail services.

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