I've just noticed our website's contact form is broken. I don't know how long it has been so and I might have missed important emails. Would it be possible to recover POST data from Apache's logs ?
EDIT: False alarm... My Google Apps account was messed up. Nonetheless it would be interesting to get an answer ;)
As far as I know, only GET querystrings are included in the log files. Otherwise the log files would be way too massive, especially when uploading BLOBs (file uploads).
According to this link it can be done with the mod_dumpio module.
I think it would probably make more sense to put it in the web application itself though.