diff --git a/deploy/README.md b/deploy/README.md
index a4e9136f..4a13e096 100644
--- a/deploy/README.md
+++ b/deploy/README.md
@@ -50,3 +50,25 @@ export DEPLOY_VSFTPD_RELOAD="/etc/init.d/vsftpd restart"
 acme.sh --deploy -d ftp.example.com --deploy-hook vsftpd
 ```
 
+## 5. Deploy the cert to local exim4 server.
+
+```sh
+acme.sh --deploy -d ftp.example.com --deploy-hook exim4
+```
+
+The default exim4 conf file is `/etc/exim/exim.conf`,  if your exim4 conf is not in the default location, you can specify one:
+
+```sh
+export DEPLOY_EXIM4_CONF="/etc/exim4/exim4.conf.template"
+
+acme.sh --deploy -d ftp.example.com --deploy-hook exim4
+```
+
+The default command to restart exim4 server is `service exim4 restart`, if it doesn't work, you can specify one:
+
+```sh
+export DEPLOY_EXIM4_RELOAD="/etc/init.d/exim4 restart"
+
+acme.sh --deploy -d ftp.example.com --deploy-hook exim4
+```
+
diff --git a/deploy/exim4.sh b/deploy/exim4.sh
index b53f58ec..bf92b438 100644
--- a/deploy/exim4.sh
+++ b/deploy/exim4.sh
@@ -4,6 +4,9 @@
 
 #returns 0 means success, otherwise error.
 
+#DEPLOY_EXIM4_CONF="/etc/exim/exim.conf"
+#DEPLOY_EXIM4_RELOAD="service exim4 restart"
+
 ########  Public functions #####################
 
 #domain keyfile certfile cafile fullchain
@@ -20,7 +23,92 @@ exim4_deploy() {
   _debug _cca "$_cca"
   _debug _cfullchain "$_cfullchain"
 
-  _err "deploy cert to exim4 server, Not implemented yet"
-  return 1
+  _ssl_path="/etc/acme.sh/exim4"
+  if ! mkdir -p "$_ssl_path"; then
+    _err "Can not create folder:$_ssl_path"
+    return 1
+  fi
+
+  _info "Copying key and cert"
+  _real_key="$_ssl_path/exim4.key"
+  if ! cat "$_ckey" >"$_real_key"; then
+    _err "Error: write key file to: $_real_key"
+    return 1
+  fi
+  _real_fullchain="$_ssl_path/exim4.pem"
+  if ! cat "$_cfullchain" >"$_real_fullchain"; then
+    _err "Error: write key file to: $_real_fullchain"
+    return 1
+  fi
+
+  DEFAULT_EXIM4_RELOAD="service exim4 restart"
+  _reload="${DEPLOY_EXIM4_RELOAD:-$DEFAULT_EXIM4_RELOAD}"
+
+  if [ -z "$IS_RENEW" ]; then
+    DEFAULT_EXIM4_CONF="/etc/exim/exim.conf"
+    if [ ! -f "$DEFAULT_EXIM4_CONF" ]; then
+      DEFAULT_EXIM4_CONF="/etc/exim4/exim4.conf.template"
+    fi
+    _exim4_conf="${DEPLOY_EXIM4_CONF:-$DEFAULT_EXIM4_CONF}"
+    _debug _exim4_conf "$_exim4_conf"
+    if [ ! -f "$_exim4_conf" ]; then
+      if [ -z "$DEPLOY_EXIM4_CONF" ]; then
+        _err "exim4 conf is not found, please define DEPLOY_EXIM4_CONF"
+        return 1
+      else
+        _err "It seems that the specified exim4 conf is not valid, please check."
+        return 1
+      fi
+    fi
+    if [ ! -w "$_exim4_conf" ]; then
+      _err "The file $_exim4_conf is not writable, please change the permission."
+      return 1
+    fi
+    _backup_conf="$DOMAIN_BACKUP_PATH/exim4.conf.bak"
+    _info "Backup $_exim4_conf to $_backup_conf"
+    cp "$_exim4_conf" "$_backup_conf"
+
+    _info "Modify exim4 conf: $_exim4_conf"
+    if _setopt "$_exim4_conf" "tls_certificate" "=" "$_real_fullchain" \
+      && _setopt "$_exim4_conf" "tls_privatekey" "=" "$_real_key"; then
+      _info "Set config success!"
+    else
+      _err "Config exim4 server error, please report bug to us."
+      _info "Restoring exim4 conf"
+      if cat "$_backup_conf" >"$_exim4_conf"; then
+        _info "Restore conf success"
+        eval "$_reload"
+      else
+        _err "Opps, error restore exim4 conf, please report bug to us."
+      fi
+      return 1
+    fi
+  fi
+
+  _info "Run reload: $_reload"
+  if eval "$_reload"; then
+    _info "Reload success!"
+    if [ "$DEPLOY_EXIM4_CONF" ]; then
+      _savedomainconf DEPLOY_EXIM4_CONF "$DEPLOY_EXIM4_CONF"
+    else
+      _cleardomainconf DEPLOY_EXIM4_CONF
+    fi
+    if [ "$DEPLOY_EXIM4_RELOAD" ]; then
+      _savedomainconf DEPLOY_EXIM4_RELOAD "$DEPLOY_EXIM4_RELOAD"
+    else
+      _cleardomainconf DEPLOY_EXIM4_RELOAD
+    fi
+    return 0
+  else
+    _err "Reload error, restoring"
+    if cat "$_backup_conf" >"$_exim4_conf"; then
+      _info "Restore conf success"
+      eval "$_reload"
+    else
+      _err "Opps, error restore exim4 conf, please report bug to us."
+    fi
+    return 1
+  fi
+  return 0
 
 }