diff --git a/Dockerfile b/Dockerfile
index 8be42bd..933d14b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,10 @@ COPY 10-auth.conf /etc/dovecot/conf.d/
 COPY 10-ssl.conf /etc/dovecot/conf.d/
 #COPY 15-lda.conf /etc/dovecot/conf.d/
 COPY 20-lmtp.conf /etc/dovecot/conf.d/
+COPY dovecot-openssl.cnf /root/
+RUN mv dovecot-openssl.cnf/mkcert.sh /root/
+RUN chmod +X /root/mkcert.sh
+RUN cd /root; ./mkcert.sh
 #COPY users /etc/dovecot/
 RUN mkdir /home/yohan
 RUN chown -R 1000:1000 /home/yohan
diff --git a/dovecot-openssl.cnf b/dovecot-openssl.cnf
new file mode 100644
index 0000000..f096eac
--- /dev/null
+++ b/dovecot-openssl.cnf
@@ -0,0 +1,23 @@
+#
+# SSLeay configuration file for Dovecot.
+#
+
+RANDFILE                = /dev/urandom
+
+[ req ]
+default_bits            = 2048
+default_keyfile         = privkey.pem
+distinguished_name      = req_distinguished_name
+prompt                  = no
+policy			= policy_anything
+req_extensions          = v3_req
+x509_extensions         = v3_req
+
+[ req_distinguished_name ]
+organizationName = scimetis.net
+organizationalUnitName = @commonName@
+commonName = @commonName@
+emailAddress = @emailAddress@
+
+[ v3_req ]
+basicConstraints        = CA:FALSE