Answered Formit frustration: it is not working on MODx 2.2.6-pl

Does your localhost have a working mail server (sendmail, qmail, etc)? Usually they don't.

That sounds like a real pain. I've lost my mind over stuff like this, and at some point, it can be really good to walk through everything step by step (and yes, it's extremely frustrating to have to do this). Here's what I've done:

1. Clear the MODx logs and the cache (or nuke the entire contents of core/cache/)
2. Open up the FormIt Snippet (or whatever the troublemaker is).
3. Add in some logging calls like the following:

$modx->log(xPDO::LOG_LEVEL_ERROR,'Here I am... inside FormIt' . __LINE__);
// Or:
$modx->log(xPDO::LOG_LEVEL_ERROR, print_r($_POST, true) ); // log ALL posted data

4. Save the modified Snippet
5. Re-submit your form
6. Check the logs

This is a painstaking process sometimes, but it will tell you exactly where the code is breaking (e.g. if you see logging messages 1, 2, but message 3 is AWOL, then you know something broke after the 2nd message). This will also tell you whether the code is executing at all. Another good thing to eyeball is the PHP log on the server AND any firewall logs (e.g. ModSecurity is an awesome application level firewall, but it can kill form posts silently and drive you insane in the process).

Install QuickEmail and diagnose to see if your site is sending emails so we can rule that out.