The plugin worked perfectly for me up until today. Now when I try to send test emails, it takes about 5 minutes to load, then tells me they’ve been sent, but they’re not delivered. I changed the encoding to “base 64” on main configuration panel and they still won’t go out. When I send the general diagnostic email (not one that I created) it gets delivered without issue.
Hi test the sending from the status panel and let us know. Almost surely your provider changed something. For example you can have the SMTP setup and it doesn’t work anymore.