after having received no answer in the german part, I 'm trying here.
when moving from 12.1 to 12.3 I copied my capisuite configuration and managed to be able to send faxes again.
I had however to notice that the sent fax had no headline, i.e. only the paramter specified in fax.conf via fax_headline - the rest of the header is present (date, station id …).
I checked fax.conf and the parameter is present???
any ideas?