[Zope] <dtml-sendmail> problems

[Stephen Pitts]

The following code generates an "SMTP Error 503: No receipients
specified".
	<dtml-sendmail mailhost=mailhost>
	From: "<dtml-var from>"
	To: "<dtml-var firstname> <dtml-var lastname> <<dtml-var toemail>>"
	Subject: <dtml-var subject>
	<dtml-var messagebody>
	</dtml-sendmail>

The variables are set as follows:
from - "Stephen Pitts <smpitts@midsouth.rr.com>"
firstname - "Stephen"
lastname - "Pitts"
toemail - "smpitts@midsouth.rr.com"
subject - "Stuff"
messagebody - "Enter your message body here"

How can I fix the code so it sends a valid email? Does Zope not support
To/From fields of the type "name email@address.com"?
-- 
Stephen Pitts
smpitts@midsouth.rr.com
webmaster - http://www.mschess.org