diff --git a/Dockerfile b/Dockerfile
index c9c4b10..8b782ce 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -41,9 +41,9 @@ ENV POSTSCREEN_GREET_ACTION="enforce"
 ENV RELAYHOST=""
 ENV SMTP_SASL_AUTH_ENABLE=no
 ENV SMTP_SASL_PASSWORD_MAPS=""
-ENV SMTP_SASL_SECURITY_OPTIONS="" # default noplaintext,noanonymous
+ENV SMTP_SASL_SECURITY_OPTIONS=""
 ENV SMTP_TLS_CAFILE=""
-ENV SMTP_TLS_MANDATORY_PROTOCOLS="" # default !SSLv2,!SSLv3
+ENV SMTP_TLS_MANDATORY_PROTOCOLS=""
 ENV SMTP_TLS_NOTE_STARTTLS_OFFER=no
 ENV SMTP_TLS_SECURITY_LEVEL=""
 ENV SMTP_TLS_SESSION_CACHE_DATABASE=""