Try to edit cyrusv2.m4.
From :
Mcyrusv2, P=[IPC], F=_MODMF_(CONCAT(_DEF_CYRUSV2_MAILER_FLAGS,
CYRUSV2_MAILER_FLAGS), `CYRUSV2'),
S=EnvFromSMTP/HdrFromL, R=EnvToL/HdrToL, E=\r\n,
to (L = SMTP)
"Mcyrusv2, P=[IPC], F=_MODMF_(CONCAT(_DEF_CYRUSV2_MAILER_FLAGS,
CYRUSV2_MAILER_FLAGS), `CYRUSV2'),
S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP/HdrToSMTP, E=\r\n,"
I have tried this, restarted sendmail, and I get the same thing.
----
Cyrus Home Page: http://cyrusimap.web.cmu.edu/
Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html