How to renew the SSL certificate for dovecot on Ubuntu Linux
Monday, December 21, 2009 posted by Till
To create new SSL certificates for the dovecot pop3 and imap server on Ubuntu, follow these steps:
Make a backup copy of the old key and certificate file
sudo cp /etc/ssl/private/dovecot.key /etc/ssl/private/dovecot.key.old
sudo cp /etc/ssl/certs/dovecot.pem /etc/ssl/certs/dovecot.pem.old
Create the new key file
openssl genrsa -out /etc/ssl/private/dovecot.key 1024
Create the new certificate file, valid for 2 years
openssl req -new -x509 -key /etc/ssl/private/dovecot.key -out /etc/ssl/certs/dovecot.pem -days 730
Then restart dovecot
/etc/init.d/dovecot restart
