Hello,
I’m facing the same kind of issue (sending paused and same message).
The problem started just after the automa tic Mailpoet updating (WordPresss dashboard parameters) to the 3.87.2 version.
As my contact list is short (11 names) and “clean” (all addresses are valid), and as nothing but the Mailpoet has changed : is this version creating the technical problem ? What can I do to solve it ?
Thank you for any help you can bring.