[imp] error code 11

[alois blasbichler]

Hello list

When a user sends messages for example to 70 recipients he get an  
error and i see in the log :

HORDE [error] [imp] sendmail returned error code 11 [pid 16291 on line  
720 of "/srv/www/htdocs/horde/imp/lib/Compose.php"]

I have seen in the release notes that is it possible to configure the  
maximum of recipients per message in imp - but where ?

Please help
luis


We use
# Horde: 3.2.1
# Imp: H3 (4.2)