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Configuring SSL Certificates

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We will now create and install a self-signed SSL certificate to support secure email.

You may want to replace these with a CA-signed certificate if that better suits your needs.

The dovecot package installs a script for generating self-signed certs at /usr/doc/dovecot-2.2.13/mkcert.sh, which you may use if you prefer. The following commands do the same thing but to a different path.

The following commands will generate a certificate good for one year. You may adjust the value after -days to make the certificate valid for a different period of time. We will use the paths used here in later steps, so please note if you change them.

mkdir -p /etc/ssl/localcerts

openssl req -new -x509 -sha256 -days 365 -nodes -out /etc/ssl/localcerts/dove.pem -keyout /etc/ssl/private/dove.key

chmod 600 /etc/ssl/localcerts/dove.pem
chmod 600 /etc/ssl/private/dove.key

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