ispconfig_update.sh --force<br />
cd /usr/local/ispconfig/interface/ssl<br />
cat ispserver.{key,crt} > ispserver.pem<br />
Stop lets encrypt SSL  from dwd.one website settings<br />
move cert and key from domain ssl folder to bak folder<br />
Add lets encrypt SSL  to dwd.one website settings<br />
<br />
cd /etc/postfix/<br />
ls<br />
mv smtpd.cert smtpd.cert-$(date +"%y%m%d%H%M%S").bak<br />
mv smtpd.key smtpd.key-$(date +"%y%m%d%H%M%S").bak<br />
ln -s /usr/local/ispconfig/interface/ssl/ispserver.crt smtpd.cert<br />
ln -s  /usr/local/ispconfig/interface/ssl/ispserver.key smtpd.key<br />
service postfix restart<br />
service dovecot restart<br />