I have a asterisk machine configured. and the voicemail to e-mail is not working. it all boils down to the sendmail config.

here is a cut from the log:

==> /var/log/maillog <==
Oct 12 11:25:05 asterisk1 sendmail[11536]: j9C9Odoi011536: from=<asterisk@asterisk1.local>, size=12946, class=0, nrcpts=1, msgid=<Asterisk-1-1880630068-402-2384@asterisk1.local>, proto=ESMTP, daemon=MTA, relay=asterisk1.local [127.0.0.1]
Oct 12 11:25:05 asterisk1 sendmail[11534]: j9C9OYxp011534: to=Simon Arndt <simon@attract.co.za>, ctladdr=asterisk (5060/502), delay=00:00:31, xdelay=00:00:26, mailer=relay, pri=42813, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (j9C9Odoi011536 Message accepted for delivery)
Oct 12 11:25:28 asterisk1 sendmail[11542]: j9C9Odoi011536: to=<simon@attract.co.za>, ctladdr=<asterisk@asterisk1.local> (5060/502), delay=00:00:33, xdelay=00:00:23, mailer=esmtp, pri=42946, relay=attract.co.za. [196.7.150.235], dsn=5.6.0, stat=Data format error
Oct 12 11:25:28 asterisk1 sendmail[11542]: j9C9Odoi011536: j9C9PSoi011542: DSN: Data format error

i take it the problem is DSN: Data format error, which i believe is to do with /etc/hosts

my hosts looks like:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 asterisk1.local asterisk1 localhost


i have a dsl line with a dynamically assigned ip.
my local-host-names is empty

please help