[TYPO3-english] Powermail prefill field with POST variable?

[Brian Bendtsen]

Hi

I want to prefill a powermail field with a POST variable from a form. Is 
this possible or can you only prefill field with value from querystring?

My ts looks something like this:

plugin.tx_powermail_pi1 {
prefill {
uid8 = TEXT
uid8.data = GP:tx_myext_pi1[nameofinputfield]
uid8.htmlSpecialChars = 1
}
}

/BB