Name: tls_server_key
Type: STRING
Default-Value: NULL
Last-Modified: 3.1.8

File containing the private key belonging to the certificate in
:imapdconf:`tls_server_cert`.  If not set, tls_server_cert must contain
both private and public key.  Two files with keys can be set, if two
certificates are used, in which case the files must be separated with comma
without spaces.
