[Zope] what's up with sendmail tag in standard_error_message?

Am I missing something? I'm running 2.3.2, and simplifying standar_error_message down to this doesn't even work. I don't have ZDebug installed (anymore -- same thing with or without ver 0.2.1): <dtml-var standard_html_header> <dtml-sendmail mailhost="ErrorMailHost" mailto="zope@bowery.com" mailfrom="Zope System Error Message" subject="Zope Error Report"> There was an error. </dtml-sendmail> <dtml-var standard_html_footer> I have a mailhost in the root dir called ErrorMailHost, and tried setting it's security totally lax (anonymous can do anything), doesn't help... if I don't have a sendmail tag in standard_error_message it works as expected. Can't believe it's not working... I'm sure plenty of people have this setup!