Lately some users have not received their automatically-generated sales/registration e-mails after purchasing a license or registering for a free trial of L3DT Professional. It seems that the IP address of the shared mail server I had been using had been listed on one or more spam blacklists. This afternoon I changed the SMTP server that is used to send the automatic e-mails. If this does not fix the problem, I'll look at moving to a new mail provider altogether.
If you've purchased a copy of L3DT Pro or registered for a free trial, and the sales / registration e-mail hasn't arrived after an hour, please contact firstname.lastname@example.org