Hi there,
A client I recently created a Drupal site for just tried to send out a test newsletter with SimpleNews, but they never received the test.
I checked into it, and while in Administer > Newsletter it shows the newsletter as having been sent, the system log on the main Administer page shows an error, which when I click on it for details says: "Newsletter [WHEN Newsletter] WHEN Newsletter could not be sent to (my client's e-mail address)". That's it. No further details on WHY it could not be sent.
The default newsletter options are set to send one copy of a test newsletter to the test address (the one that was in the error message), in plain text. She did add a file attachment to it, though (a PDF of the newsletter, 160k in size). Interestingly, although it shows as having been sent, it does not show as having been published -- would that make a difference? Does it need to be published in order to be sent? I think what she was hoping to do was test the newsletter system without having the test newsletter she sent out be visible on the web site. You would think that ought to be possible...
The log shows the cron run as having been completed every hour, but the error did not occur during the cron run, it occurred during the initial send about a half-hour earlier, so I don't think this is the cron problem others have posted about.