I was using this plugin without any problems for a few weeks now. I updated to the new wordpress and it continued to work fine although Facebook did change my mobile email address for my FB page once, but I caught on and updated to the new FB email address they provided in my plugin. Then today it stopped working for no reason that I could see or understand.

What I did today was I deleted the jetpack plugin that I had on WP because it was messing up the another plugin I had for a customized mobile version of my site. After I did this is when it stopped working, I don't know if it was somehow related to the problem but just incase I reinstalled and reactivated the jetpack plugin. Still not working.

I've deleted wp email-to-facebook and reinstalled to no avail. This plugin is is crucially important to me. I really really hope that someone can help me out with this problem, it's vital to my site. I've played around with all the other plugins that offer the same or similar type services and they suck. Their formats are not as clean as yours. Please, por favor, asistencia.

Try using another email address (your regular email for example) and see if you get an email. Then we know the server is sending emails.

Then try if you have better luck with wp_mail() instead of the PHP mail function.

Hey guys...I had the same problem. I did the test you suggested and it successfully sent to my personal email with out a problem. I was able to determine that FB doesn't like the link shortener tinyurl.com for some reason.
I thought it was a format thing so I tested a direct email to my secret fb address that simulated the php send from the wp site. This would include a message from the default wp admin email address that includes a tinyurl link in the subject line and no content in the message body. I suspected that FB didn't like the url or the empty body. Neither was true. It let me send a url in the subject line with an empty body and with a body that had content. The only time it bounced the message was when it included tinyurl.com. And it did so regardless of if the tinyurl.com was in the subject or body. So it appears as though (at least temporarily) FB is filtering tinyurl.com and bouncing emails.

The work around solution was to simply disable the link shortener service in PTF plugin. I suspose you could also try some of the other shortener options, but I chose to stick with my url since it is already sifficiently short.

Hope that helps somebody.

Thanks very helpful. I will include it in the FAQ