Voicemail can't use serveremail as variable

I’m trying to fill in the value of serveremail from AstDB database value without success, while I can use the value in the emailsubject, and emailbody without problem, any idea how to solve this problem?

The voicemail box line:

299 => 1234, ITHD,@*,serveremail=${DB(email/address)}|attach=yes|pbxskip=yes|review=yes|delete=yes

TIA