[exim] Exim is listening on port 80

Hello,

I have a problem : one exim is listening on port 80, so Apache can't
restart. I really don't know why it do this, but it is not the first time...
Of course, there is not any reference to "80", "http" or "www" in
the exim4 conf... :S

What I see :

w30100:~# netstat -lnp | grep exim
tcp        0      0 0.0.0.0:25              0.0.0.0:*               
LISTEN     15778/exim4
tcp6       0      0 :::80                   :::*                    
LISTEN     3108/exim4

w30100:/var/log/apache2# ps auxw | grep 3108
root      3108  0.0  0.0 20024 1724 ?        Ss   Apr14   0:00 
/usr/sbin/exim4 -Mc 1FUOup-0000o7-5e

Any idea ?

Thanks
Olivier