@buzztone I’m not using SMTP, I just saw it was one of the questions asked on a previous comment and I wanted to provide as much info as possible up-front. I’ve jused SuperCache along with CF7 for a long time and never had issues, but perhaps something happened in a recent upgrade.
Could you provide a little more info on your last statement? Is there anything off-hand you can think might be a common factor if this were the case? The test you send went through, but a later test didn’t.
Overall it sounds like the issue is most likely due to how you collect and use the user’s email address in CF7.
Thanks so much for you time and help!