[Zope] TypeError len() of unsized object

[Waqar Ali]

I am getting the a len() of unsized object error and cant figure out why.
Even when I tried after putting tother the feedback form example:

Error Type: TypeError
Error Value: len() of unsized object

System configuration:
-Zope version 2.3
-Sendmail 8.10.2-C1
-Python (the one that comes standard with zope)
-Linux Redhat on Cobalt Raq 4

many thanks to all zopers...

wa.

Here is the error trace:
Traceback (innermost last):
  File /home/opt/zope/230/lib/python/ZPublisher/Publish.py, line 222, in
publish_module
  File /home/opt/zope/230/lib/python/ZPublisher/Publish.py, line 187, in
publish
  File /home/opt/zope/230/lib/python/Zope/__init__.py, line 221, in
zpublisher_exception_hook
    (Object: Traversable)
  File /home/opt/zope/230/lib/python/ZPublisher/Publish.py, line 171, in
publish
  File /home/opt/zope/230/lib/python/ZPublisher/mapply.py, line 160, in
mapply
    (Object: SendFeedback)
  File /home/opt/zope/230/lib/python/ZPublisher/Publish.py, line 112, in
call_object
    (Object: SendFeedback)
  File /home/opt/zope/230/lib/python/OFS/DTMLDocument.py, line 189, in
__call__
    (Object: SendFeedback)
  File /home/opt/zope/230/lib/python/DocumentTemplate/DT_String.py, line
538, in __call__
    (Object: SendFeedback)
  File /home/opt/zope/230/lib/python/Products/MailHost/SendMailTag.py, line
188, in render
    (Object: MailHost)
  File /home/opt/zope/230/lib/python/Products/MailHost/MailHost.py, line
222, in send
    (Object: MailHost)
  File /home/opt/zope/230/lib/python1.5/smtplib.py, line 465, in sendmail
  File /home/opt/zope/230/lib/python1.5/smtplib.py, line 349, in mail
  File /home/opt/zope/230/lib/python1.5/smtplib.py, line 118, in quoteaddr
  File /home/opt/zope/230/lib/python1.5/rfc822.py, line 451, in parseaddr
  File /home/opt/zope/230/lib/python1.5/rfc822.py, line 496, in getaddrlist
  File /home/opt/zope/230/lib/python1.5/rfc822.py, line 504, in getaddress
  File /home/opt/zope/230/lib/python1.5/rfc822.py, line 484, in gotonext
TypeError: (see above)


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