[Dovecot] poprelay, ip v4 vs ip v6 adresses

[Gerhard Hofmann]

Hi list,

I would like to use poprelay as described here:
http://wiki.dovecot.org/PopRelay

Excerpt from my /var/log/mail.log:
dovecot: 2006-01-26 11:27:52 Info: imap-login: Login: user=<planat99>, 
method=plain, rip=192.168.1.202, lip=192.168.1.5
dovecot: 2006-01-26 13:10:10 Info: pop3-login: Login: user=<planat99>, 
method=PLAIN, rip=192.168.1.202, lip=192.168.1.5

(these are only two lines but wrapped by my news client)

As you can see, the logged remote ip address is in normal ip v4 style, 
no "ffff" stuff here.

The WIKI page says that ip addresses should be in v6-mapped style, how 
can I achieve this? Respectively, how must I change poprelay.conf to 
work with my current mail.log style?

TIA
Gerhard