You will also need SASL and SASL modules (libsasl2 and libsasl2-modules respectively in Debian).

SASL AUTH for outgoing SMTP conections is controlled by ‘smtp_*’ parameters in main.cf.
Quick-and-dirty solution is:

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Create Courier-imap server certificate:
sudo pico /etc/courier/imapd.cnf &&
sudo rm /etc/courier/imapd.pem && Read the rest of this entry »