In a simple test (using a modified version of wwSmtp_sample.prg) sending to only 2 recipients, the first email gets sent, but the second one never does.
I've swapped the email addresses and the same thing happens i.e. first (different) one goes out, 2nd one doesn't.
I've also used a variety of email addresses to test (in-house and others).
The console shows "Failure sending mail"
-Todd