[TYPO3-english] Powermail:change subject acc. to action

[Rupali Gupta]

Hello List,

I have designed a form for newsletter subscription (with powermail). Now the
subject of the e-mail for this form should also change  according to the
action provided by user.

subject: subscribe ( if user checks subsribe checkbox)
subject: unsubscribe ( if user checks unsubsribe checkbox)

how to do this?
-- 
Regards,
Rupali