diff --git a/Dockerfile b/Dockerfile
index 551866d..7c354d5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 FROM node:latest
 
 ENV HOSTNAME=${HOSTNAME:-haraka}
+ENV EMAIL=${EMAIL:-test@email.tld}
 
 RUN echo "deb http://ftp.debian.org/debian jessie-backports main" >> /etc/apt/sources.list && \
     apt-get update && apt-get upgrade -y && apt-get -t jessie-backports install -y supervisor certbot cron && \
diff --git a/haraka.sh b/haraka.sh
index 1ffe73b..5d7fc15 100644
--- a/haraka.sh
+++ b/haraka.sh
@@ -10,7 +10,7 @@ echo $HOSTNAME > /haraka/config/me
 
 # Get and install certificates from Let's Encrypt
 if [ ! -f /haraka/config/tls ]; then
-  certbot certonly -n --agree-tos -d "$HOSTNAME" --standalone --preferred-challenges http
+  certbot certonly -n --agree-tos --email "$EMAIL" -d "$HOSTNAME" --standalone --preferred-challenges http
   mkdir -p /haraka/config/tls
   cd /haraka/config/tls
   ln -s /etc/letsencrypt/live/$HOSTNAME/privkey.pem tls-key.pem