[Zope] NEWBIE-QUESTION concerning forms and saving input

[cruciatuz]

I want to provide the visitor on my website a form like that:

email: __________ | sendbutton

to subscribe to a newsletter (exactly: to fetch the email address
from the visitor and to write it into a single file)

the newsletter will be manually generated. 

How can i do that exactly?
Do i need a dtml-method for fetching the email address?
How do i append the address to a file in the same zope-directory?

-- 
thx in advance,
Stefan Antoni
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Mit Jan  9 18:39:19 EST 2002