[Zope] sendmail Traceback

[Stephan Göldi]

I get this traceback when I use the sendmail tag:

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

Traceback (innermost last):
  File /home/www/zope/new/lib/python/ZPublisher/Publish.py, line 223, in
publish_module
  File /home/www/zope/new/lib/python/ZPublisher/Publish.py, line 187, in
publish
  File /home/www/zope/new/lib/python/Zope/__init__.py, line 226, in
zpublisher_exception_hook
    (Object: SupportManageHandler)
  File /home/www/zope/new/lib/python/ZPublisher/Publish.py, line 171, in
publish
  File /home/www/zope/new/lib/python/ZPublisher/mapply.py, line 160, in
mapply
    (Object: index_html)
  File /home/www/zope/new/lib/python/ZPublisher/Publish.py, line 112, in
call_object
    (Object: index_html)
  File /home/www/zope/new/lib/python/OFS/DTMLDocument.py, line 199, in
__call__
    (Object: index_html)
  File /home/www/zope/new/lib/python/DocumentTemplate/DT_String.py, line
544, in __call__
    (Object: index_html)
  File /home/www/zope/new/lib/python/Products/MailHost/SendMailTag.py,
line 189, in render
    (Object: MailHost)
  File /home/www/zope/new/lib/python/Products/MailHost/MailHost.py, line
231, in send
    (Object: MailHost)
  File /home/www/zope/new/lib/python2.1/smtplib.py, line 481, in
sendmail
  File /home/www/zope/new/lib/python2.1/smtplib.py, line 363, in mail
  File /home/www/zope/new/lib/python2.1/smtplib.py, line 122, in
quoteaddr
  File /home/www/zope/new/lib/python2.1/rfc822.py, line 475, in
parseaddr
  File /home/www/zope/new/lib/python2.1/rfc822.py, line 520, in
getaddrlist
  File /home/www/zope/new/lib/python2.1/rfc822.py, line 528, in
getaddress
  File /home/www/zope/new/lib/python2.1/rfc822.py, line 508, in gotonext
TypeError: (see above)


Can anybody point me in the right direction?

-TIA-
Stephan