[Mailman-Users] how to get "my letter is opened" information without Delivery or read receipts are being checked

[Gulyás Krisztián]

Dear All,

I would like to send html-formatted e-mails to my customers through mailman
mailing list. I would like to know of each recepients whether they've read
my letter or not. If I use Delivery or read receipts, the recepient can
decide he / she sends me the receipts or not. But I need this information in
all cases.

Have you any ideas?

I would use an image tag for it, with an online source. The source would be
a php webpage and variables (letter id, recepient id) would be given to that
page by the letter (or Outlook, etc.) For example: <img
src='http://exapmle.com/?u=%userid%&l=%letterid%' alt="" width="1"
height="1"> When a user opens my letter, the php page would receive these
variables and it would store the "opened" information in a database by the
letter and recepient id.

I think this is a very good idea, but a very important thing is still
needed: if I send an e-mail to my mailing list with a user and letter id,
everyone in my mailing list would receive his / her mail with the same ids.
So this solution isn't a per user solution (I only know that my letter was
opened at least once).

Is there any solution to change the %userid% string to the recepient's
e-mail address for each recepient's mail by mailman?

Thank you very much!

Best Regards,


Chris