My server went down after they have changed the rules and i was sending more then the allowded emails.
I have solved the problem, but after that the newsletter plugin is not working correctly anymore.
Smtp test arrives but testing e-mails not. When i send the newsletter it arrives just to some subscribers.
I have set the cronjob and everything seems to be worksing correctly.
SMTP test works but if the SMTP configuration is not set as active, it won’t be used. Is it active?
Anyway the provider may have added some rules to your account, limiting the number of email: have you asked them about after the down?
I have try from the diagnostic. Direct WordPress email is sending using the newsletter, both text and html and mixed.
I just try the blank theme now and just one test subscriber receive it. Then i just send with an other template and no one receive it.
I just send an e-mail to the server with your suggestion and they asked me for the email header to see if the message was dropped. Waiting for an answer! 🙁