Test emails not working

I recently upgraded to the newest PHPlist version. I’ve set up and formatted a new campaign, and I’m trying to send myself a test email. I put in my email address and click on “Send Test” and get the message “Sent test to ___.com; success”, but no email shows up in my inbox, or in spam folder or anywhere.

Help much appreciated.

I’m experiencing the same problem.
Version: 3.3.1
Browser: FireFox Quantum 59.0.2 (64-bit)
The test user is a member of the list.
The campaign is only going to a few (test) users anyway, so I went ahead and sent it, putting in a different email address (not a member of the list) to get a notification when processing started and finished.
No test emails received
No processing reports received
No actual emails received
Logs indicate all messages sent successfully.