diff --git a/data/Dockerfiles/netfilter/main.py b/data/Dockerfiles/netfilter/main.py
index 5b718a94b..65433f382 100644
--- a/data/Dockerfiles/netfilter/main.py
+++ b/data/Dockerfiles/netfilter/main.py
@@ -167,12 +167,18 @@ def ban(address):
     logger.logCrit('Banning %s for %d minutes' % (net, NET_BAN_TIME / 60 ))
     if type(ip) is ipaddress.IPv4Address and int(f2boptions['manage_external']) != 1:
       with lock:
-        logdebug("Calling tables.banIPv4(%s)" % net)
-        tables.banIPv4(net)
+        if not tables.isIPv4Banned(net):
+            logdebug("Calling tables.banIPv4(%s)" % net)
+            tables.banIPv4(net)
+        else:
+            logdebug("IPv4 %s is already banned." % net)
     elif int(f2boptions['manage_external']) != 1:
       with lock:
-        logdebug("Calling tables.banIPv6(%s)" % net)
-        tables.banIPv6(net)
+        if not tables.isIPv6Banned(net):
+          logdebug("Calling tables.banIPv6(%s)" % net)
+          tables.banIPv6(net)
+        else:
+            logdebug("IPv6 %s is already banned." % net)
 
     logdebug("Updating F2B_ACTIVE_BANS[%s]=%d" %
               (net, cur_time + NET_BAN_TIME))
diff --git a/data/Dockerfiles/netfilter/modules/IPTables.py b/data/Dockerfiles/netfilter/modules/IPTables.py
index 3d3d43974..9fb4ce0bc 100644
--- a/data/Dockerfiles/netfilter/modules/IPTables.py
+++ b/data/Dockerfiles/netfilter/modules/IPTables.py
@@ -7,6 +7,15 @@ class IPTables:
     self.chain_name = chain_name
     self.logger = logger
 
+  def isIPBanned(self, net, family):
+    return False
+
+  def isIPv4Banned(self,net):
+    return False 
+
+  def isIPv6Banned(self,net):
+    return False 
+
   def initChainIPv4(self):
     if not iptc.Chain(iptc.Table(iptc.Table.FILTER), self.chain_name) in iptc.Table(iptc.Table.FILTER).chains:
       iptc.Table(iptc.Table.FILTER).create_chain(self.chain_name)
diff --git a/data/Dockerfiles/netfilter/modules/NFTables.py b/data/Dockerfiles/netfilter/modules/NFTables.py
index 7740fa59f..705676082 100644
--- a/data/Dockerfiles/netfilter/modules/NFTables.py
+++ b/data/Dockerfiles/netfilter/modules/NFTables.py
@@ -15,6 +15,46 @@ class NFTables:
 
     self.search_current_chains()
 
+  def get_list_dict(self, family):
+    base_dict = self.get_base_dict()
+    chain_dict = {'chain': {'family': family, 'table': 'filter', 'name': self.chain_name,}}
+    list_dict = {'list': chain_dict}
+    base_dict['nftables'].append(list_dict)
+    return base_dict
+
+  def isIPBanned(self, net, family):
+    list_dict = self.get_list_dict(family)
+    rules = self.nft_exec_dict(list_dict)
+    if '/' in net:
+      prefix, length = net.split('/')
+    else:
+      prefix = net
+      length = '32' if family == 'ip' else '128'
+    if not 'nftables' in rules:
+      return False
+    for rule in rules['nftables']:
+      if not 'rule' in rule:
+        continue #Skip anything that is not a rule
+      for expression in rule['rule']['expr']:
+        if not 'match' in expression:
+          continue #Skip anything that is not a match statement
+        right = expression['match']['right']
+        try:
+          if isinstance(right, str):
+            if right == prefix:
+              return True
+          elif right['prefix']['addr'] == prefix and str(right['prefix']['len']) == length:
+            return True
+        except (KeyError,TypeError):
+          pass
+    return False
+
+  def isIPv4Banned(self,net):
+    return self.isIPBanned(net, 'ip')
+
+  def isIPv6Banned(self,net):
+    return self.isIPBanned(net, 'ip6')
+
   def initChainIPv4(self):
     self.insert_mailcow_chains("ip")
 
diff --git a/docker-compose.yml b/docker-compose.yml
index f09afca2a..7074a5e4f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -502,7 +502,7 @@ services:
             - acme
 
     netfilter-mailcow:
-      image: ghcr.io/mailcow/netfilter:1.63
+      image: ghcr.io/mailcow/netfilter:1.63a
       stop_grace_period: 30s
       restart: always
       privileged: true