[exim] Checking header against RFC2822

Hello,

if a message contains header field
"To: user@domain <user@domain>"
then "verify = header_syntax" returns error, in my case

Feb 28 14:59:02 gopher exim[74934]: 2012-02-28 14:59:02 1S2Mdm-000JUc-Ch H=happy.kiev.ua (happy) [213.133.161.33] F=<gul@???> rejected after DATA: message header fail syntax check: malformed address: <qml@???>\n may not follow qml@??? : failing address in "To:" header is: qml@??? <qml@???>

But why?

--
Pavel