domain name with dash

[kapusta]

I am trying put domain name in virtualdomains file but it has dash ex: do-main.com:user when I create /home/user/.qmail-do-main it just does not work it it tells me user does not exist i tried to use "?" in .qmail-do?main  does not work i tried to put in virtualdomains do?main.com:user message is looping Is there a way making this work Thank you Denis