HI Timo, On http://wiki2.dovecot.org/SSL/DovecotConfiguration I read in chapter SSL security settings: When Dovecot starts up for the first time, it generates new 512bit and 1024bit Diffie Hellman parameters and saves them into <prefix>/var/lib/dovecot/ssl-parameters.dat. After the initial creation they're by default regenerated every week. With newer computers the generation shouldn't take more than a few seconds, but with older computers it can take as long as half an hour. The extra security gained by the regeneration is quite small, so with slower computers, for Dovecot versions prior to v2.2, you might want to disable it If I discover the default-value of ssl_parameters_regenerate I receive: # doveconf -d ssl_parameters_regenerate ssl_parameters_regenerate = 0 In your doku you wrote, that dovecot will regenerate every week. :/ ? I set it to "1 hours" and watch if /var/lib/dovecot/ssl-parameters.dat is build every hour, but nothing happens. ssl-parameters.dat is only rebuild, if I change ssl_dh_parameters_length What's the problem? What I've made false? ttyl Django -- http://dokuwiki.nausch.org http://wetterstation-pliening.info http://ebersberger-liedersammlung.de