[Mailman-Users] How to check if E-mail from Mailman was opened by the subscriber ?
david at midrange.com
Thu Jul 27 11:41:38 EDT 2017
On 7/27/2017 10:09 AM, Christian F Buser via Mailman-Users wrote:
> Compare it with normal (paper, snail mail) you send out to your
> clients. There, you have no guarantee if the recipient opened it /
> looked at it - unless you send it by "registered mail".
FWIW: Even sending registered snail mail is no guarantee that the letter was opened or read ... just that it was delivered.
As to the OP's question ... There's no sure way to verify a message has been read. Some MLM systems use HTML beacons, but they are trivial to defeat. In fact, most email programs provide the option to not load remote images when viewing. Also, if someone chooses to read all mail in plain text, the beacon is meaningless.
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