Mail-Aliases like "mr.nobody@..." are not accepted by qmail

[ngrafe]

Hi,

i've added mail-aacounts like "mr.nobody@..." oder "paul.fassbinder@...".

This adresses are also used to login on the smpt (qmail).
But qmail doesn't accept this names, outgoing mails are sent by my local client instead of my smtp-server.

I've found some information about this problem, caused by qmail. Qmail replaces dots (.) with colons )
But how can I use adresses with dots in the alias?

Thank you
Nils