I am trying to use the Endpoint Specification (http://support.addthis.com/customer/portal/articles/381265-addthis-sharing-endpoints#services) documentation to share a URL with someone via email. However, it does not seem to ever deliver the message even though the browser windows specifies that the message was delivered successfully.
To reproduce the issue, here's what I've done.
1. Visit http://support.addthis.com/customer/portal/articles/381265-addthis-sharing-endpoints#services
2. Click on the Share Menu link example (http://api.addthis.com/oexchange/0.8/offer?url=http://addthis.com)
3. Click the email option
4. Enter a to and from address along with the captcha and click Send
5. A new screen will be displayed saying it was successful, but the message will not be delivered.
I thought it might not be delivered because of spam filters on my server. However, I've monitored the log files and I never even see an SMTP connection from AddThis to my mail server to deliver the message.
Known issue? Any ideas what I might be doing wrong?