86 lines
3.5 KiB
Plaintext
86 lines
3.5 KiB
Plaintext
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##
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## SSL settings
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##
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# SSL/TLS support: yes, no, required. <doc/wiki/SSL.txt>
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# Disable plain (unencrypted) POP3 and IMAP, allowed are only POP3+TLS,
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# POP3S, IMAP+TLS and IMAPS.
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# Plain IMAP and POP3 are still allowed for local connections.
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ssl = required
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# PEM encoded X.509 SSL/TLS certificate and private key. They're opened before
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# dropping root privileges, so keep the key file unreadable by anyone but
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# root. Included doc/mkcert.sh can be used to easily generate self-signed
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# certificate, just make sure to update the domains in dovecot-openssl.cnf
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ssl_cert = </etc/ssl/dovecot/server.pem
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ssl_key = </etc/ssl/dovecot/server.key
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# If key file is password protected, give the password here. Alternatively
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# give it when starting dovecot with -p parameter. Since this file is often
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# world-readable, you may want to place this setting instead to a different
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# root owned 0600 file by using ssl_key_password = <path.
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#ssl_key_password =
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# PEM encoded trusted certificate authority. Set this only if you intend to use
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# ssl_verify_client_cert=yes. The file should contain the CA certificate(s)
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# followed by the matching CRL(s). (e.g. ssl_ca = </etc/ssl/certs/ca.pem)
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#ssl_ca =
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# Require that CRL check succeeds for client certificates.
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#ssl_require_crl = yes
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# Directory and/or file for trusted SSL CA certificates. These are used only
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# when Dovecot needs to act as an SSL client (e.g. imapc backend or
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# submission service). The directory is usually /etc/ssl/certs in
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# Debian-based systems and the file is /etc/pki/tls/cert.pem in
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# RedHat-based systems. Note that ssl_client_ca_file isn't recommended with
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# large CA bundles, because it leads to excessive memory usage.
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#ssl_client_ca_dir =
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#ssl_client_ca_file =
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# Require valid cert when connecting to a remote server
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#ssl_client_require_valid_cert = yes
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# Request client to send a certificate. If you also want to require it, set
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# auth_ssl_require_client_cert=yes in auth section.
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#ssl_verify_client_cert = no
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# Which field from certificate to use for username. commonName and
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# x500UniqueIdentifier are the usual choices. You'll also need to set
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# auth_ssl_username_from_cert=yes.
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#ssl_cert_username_field = commonName
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# SSL DH parameters
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# Generate new params with `openssl dhparam -out /etc/dovecot/dh.pem 4096`
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# Or migrate from old ssl-parameters.dat file with the command dovecot
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# gives on startup when ssl_dh is unset.
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#ssl_dh = </etc/dovecot/dh.pem
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# Minimum SSL protocol version to use. Potentially recognized values are SSLv3,
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# TLSv1, TLSv1.1, TLSv1.2 and TLSv1.3, depending on the OpenSSL version used.
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#
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# Dovecot also recognizes values ANY and LATEST. ANY matches with any protocol
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# version, and LATEST matches with the latest version supported by library.
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#ssl_min_protocol = TLSv1.2
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# SSL ciphers to use, the default is:
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#ssl_cipher_list = ALL:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH
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# To disable non-EC DH, use:
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#ssl_cipher_list = ALL:!DH:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH
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# Colon separated list of elliptic curves to use. Empty value (the default)
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# means use the defaults from the SSL library. P-521:P-384:P-256 would be an
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# example of a valid value.
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#ssl_curve_list =
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# Prefer the server's order of ciphers over client's.
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ssl_prefer_server_ciphers = yes
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# SSL crypto device to use, for valid values run "openssl engine"
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#ssl_crypto_device =
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# SSL extra options. Currently supported options are:
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# compression - Enable compression.
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# no_ticket - Disable SSL session tickets.
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#ssl_options =
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