we are focussing a problem with eNewsletter. The current sending method is via SMTP. That work(ed) perfectly until our last newsletter was sent on March 1st. Today we wanted to send the next newsletter and the plugin does not connect to our mail server anymore:
The following From address failed: email@example.com : Called Mail() without being connected
What did we in between? We installed WPMU Smush PRO and Hummingbird - and maybe non-email related updates of other plugins. Additionally, we tried to connect with a new email address. This did not solve it.
We appreciate your help - as we need to send newsletters soon, so I granted access already.