diff --git a/conf/main_ipv4.conf.sample b/conf/main_ipv4.conf.sample
index a2f3368..5479c0c 100644
--- a/conf/main_ipv4.conf.sample
+++ b/conf/main_ipv4.conf.sample
@@ -289,6 +289,23 @@ mail_user_ports="$standard_mailuser_ports"
 mail_client_ips=""
 forward_mail_client_ips=""
 
+
+# - Dovecot auth service
+# -
+dovecot_auth_service=false
+
+# - Port listen for dovecot auth requests
+# -
+dovecot_auth_port=44444
+
+# - Client Network(s) allowed to connect to dovecot's auth service
+# -
+# - Example:
+# -    dovecot_auth_allowed_networks="192.68.11.64/27 194.150.169.139"
+# - 
+dovecot_auth_allowed_networks=""
+
+
 # - FTP Server
 # -
 ftp_server_ips=""
diff --git a/conf/main_ipv6.conf.sample b/conf/main_ipv6.conf.sample
index 261ea32..768feb4 100644
--- a/conf/main_ipv6.conf.sample
+++ b/conf/main_ipv6.conf.sample
@@ -305,6 +305,23 @@ mail_user_ports="$standard_mailuser_ports"
 mail_client_ips=""
 forward_mail_client_ips=""
 
+
+# - (local) Dovecot auth service
+# -
+dovecot_auth_service=false
+
+# - Port listen for dovecot auth requests
+# -
+dovecot_auth_port=44444
+
+# - Client Network(s) allowed to connect to dovecot's auth service
+# -
+# - Example:
+# -    dovecot_auth_allowed_networks="2001:678:a40:3000::/64 2a01:30:0:13:2f7:50ff:fed2:cef7"
+# - 
+dovecot_auth_allowed_networks=""
+
+
 # - FTP Server
 # -
 ftp_server_ips=""
diff --git a/conf/post_decalrations.conf b/conf/post_decalrations.conf
index 89056af..2ebc4bc 100644
--- a/conf/post_decalrations.conf
+++ b/conf/post_decalrations.conf
@@ -272,6 +272,14 @@ for _ip in $forward_mail_client_ips ; do
    forward_mail_client_ip_arr+=("$_ip")
 done
 
+# ---
+# - (local) Dovecot auth service
+# ---
+declare -a dovecot_auth_allowed_network_arr
+for _port in $dovecot_auth_allowed_networks ; do
+   dovecot_auth_allowed_network_arr+=("$_port")
+done
+
 # ---
 # - IP Addresses Mumble Server
 # ---
diff --git a/ip6t-firewall-server b/ip6t-firewall-server
index 01d1cb8..9461923 100755
--- a/ip6t-firewall-server
+++ b/ip6t-firewall-server
@@ -1361,6 +1361,27 @@ else
 fi
 
 
+# ---
+# - (local) Dovecot auth service
+# ---
+
+echononl "\t\t(local) Dovecot auth service"
+
+if [[ -n "$dovecot_auth_service" ]] && $dovecot_auth_service ; then
+
+   if [[ ${#dovecot_auth_allowed_network_arr[@]} -gt 0 ]] && [[ -n "$dovecot_auth_port" ]]; then
+      for _ip in ${dovecot_auth_allowed_network_arr[@]} ; do
+         $ip6t -A INPUT -p tcp -s $_ip --dport $dovecot_auth_port -m state --state NEW -j ACCEPT
+      done
+      echo_done
+   else
+      echo_failed
+   fi
+else
+   echo_skipped
+fi
+
+
 # ---
 # - Mail Client (Submission/SMTPS/POPS/IMAPS) out only
 # ---
diff --git a/ipt-firewall-server b/ipt-firewall-server
index 25e411f..eaed5bd 100755
--- a/ipt-firewall-server
+++ b/ipt-firewall-server
@@ -1637,6 +1637,27 @@ else
 fi
 
 
+# ---
+# - (local) Dovecot auth service
+# ---
+
+echononl "\t\t(local) Dovecot auth service"
+
+if [[ -n "$dovecot_auth_service" ]] && $dovecot_auth_service ; then
+
+   if [[ ${#dovecot_auth_allowed_network_arr[@]} -gt 0 ]] && [[ -n "$dovecot_auth_port" ]]; then
+      for _ip in ${dovecot_auth_allowed_network_arr[@]} ; do
+         $ipt -A INPUT -p tcp -s $_ip --dport $dovecot_auth_port -m state --state NEW -j ACCEPT
+      done
+      echo_done
+   else
+      echo_failed
+   fi
+else
+   echo_skipped
+fi
+
+
 # ---
 # - HTTP(S) OUT
 # ---