Hi there, I started to use MailHost on a Zope 2.42 installation. What I do is as follows: <dtml-sendmail mailhost="MailHost"> to: robert@redcor.ch subject:Das ist die Testmail from:Halleluja Das ist der Body von dieser Mail </dtml-sendmail> I get a traceback as included. Now my questions: What could be the reason? There were updates to the MailHost. Can I use the ones from the CVS trunk? If not is there a Zope 2.42 (or 2.43) compatible version? Thanks Robert Error Type: TypeError Error Value: len() of unsized object Traceback (innermost last): File /var/lib/zope/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /var/lib/zope/lib/python/ZPublisher/Publish.py, line 187, in publish File /var/lib/zope/lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: AA) File /var/lib/zope/lib/python/ZPublisher/Publish.py, line 171, in publish File /var/lib/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: mailtest) File /var/lib/zope/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: mailtest) File /var/lib/zope/lib/python/OFS/DTMLMethod.py, line 195, in __call__ (Object: mailtest) File /var/lib/zope/lib/python/DocumentTemplate/DT_String.py, line 546, in __call__ (Object: mailtest) File /var/lib/zope/lib/python/Products/MailHost/SendMailTag.py, line 189, in render (Object: MailHost) File /var/lib/zope/lib/python/Products/MailHost/MailHost.py, line 231, in send (Object: MailHost) File /usr/local/lib/python2.1/smtplib.py, line 481, in sendmail File /usr/local/lib/python2.1/smtplib.py, line 363, in mail File /usr/local/lib/python2.1/smtplib.py, line 122, in quoteaddr File /usr/local/lib/python2.1/rfc822.py, line 475, in parseaddr File /usr/local/lib/python2.1/rfc822.py, line 520, in getaddrlist File /usr/local/lib/python2.1/rfc822.py, line 528, in getaddress File /usr/local/lib/python2.1/rfc822.py, line 508, in gotonext TypeError: (see above)