saphiroptimiste on "[Plugin: MailPoet Newsletters] Send newsletter just to user didn't open de first newsletter"

I would like to send a standard newsletter but then, send another newsletter to the same list but only for those who have not opened the email or who opened but didn't click in link.
I have no problem to send the first email but the next I don't know how I do.

https://wordpress.org/plugins/wysija-newsletters/

Bonjour
j'ai envoyé un test d'infolettre à 3 personnes
et après l'avoir fait je n'arrive plus à faire les modifications
Pouvez me dire comment faire

i sent newsletter test to 3 people
and after that i canot modify my newsletter
Could you tell me how to do ?

Thank you