# Issue
/var/log/mail.log:
Sep 15 15:06:46 hostname pop3d-ssl: couriertls: /etc/courier/pop3d.pem: error:0906D06C:PEM routines:PEM_read_bio:no start line
# Solution
The new version of Courier requires this new configuration inside /etc/courier/pop3d-ssl:
##NAME: TLS_DHPARAMS:0
#
# TLS_DHPARAMS - DH parameter file.
#
TLS_DHPARAMS=/etc/courier/dhparams.pem
Check for the presence of a /etc/courier/pop3d-ssl.dpkg-dist file to see the differences between your configuration and the new default configuration.
(Don't forget to restart Courier: /etc/init.d/courier-authdaemon restart ; /etc/init.d/courier-pop-ssl restart)
Kudos to Bryan Wann for the solution.
