diff --git a/components/filters/filter-rule-modal.tsx b/components/filters/filter-rule-modal.tsx
index 3fca0201f..090d5e19c 100644
--- a/components/filters/filter-rule-modal.tsx
+++ b/components/filters/filter-rule-modal.tsx
@@ -224,6 +224,9 @@ export function FilterRuleModal({
   const otherForwards = forwardsBefore + (ruleStops({ actions, stopProcessing }) ? 0 : forwardsAfter);
   const forwardLimit = typeof maxRedirects === "number" && maxRedirects > 0 ? maxRedirects : null;
   const forwardOverLimit = forwardLimit !== null && forwardCount + otherForwards > forwardLimit;
+  // A limit of 0: the server runs no redirect at all, as the out of office
+  // card also takes it. A forward the rule already has stays, to be removed.
+  const forwardUnavailable = maxRedirects === 0;
 
   // While editing, condition.value is always the raw string typed into the
   // input (commas not yet split). Convert to array form here on save so a
@@ -615,7 +618,7 @@ export function FilterRuleModal({
                     className={selectClass}
                     aria-label={t("actions")}
                   >
-                    {ALL_ACTION_TYPES.map((a) => (
+                    {ALL_ACTION_TYPES.filter((a) => !(forwardUnavailable && a === "forward" && action.type !== "forward")).map((a) => (
                       <option
                         key={a}
                         value={a}
@@ -712,6 +715,11 @@ export function FilterRuleModal({
                 </div>
               ))}
             </div>
+            {forwardUnavailable && forwardCount > 0 && (
+              <p className="mt-2 text-xs text-amber-600 dark:text-amber-400">
+                {t("forward_unavailable")}
+              </p>
+            )}
             {forwardOverLimit && (
               <p className="mt-2 text-xs text-amber-600 dark:text-amber-400">
                 {t("forward_limit", { count: forwardLimit })}
diff --git a/components/settings/filter-settings.tsx b/components/settings/filter-settings.tsx
index 13657222f..046f65936 100644
--- a/components/settings/filter-settings.tsx
+++ b/components/settings/filter-settings.tsx
@@ -301,6 +301,8 @@ export function FilterSettings() {
   const runOrder = inRunOrder(rules, vacationForward);
   const tooManyForwards =
     typeof redirectLimit === "number" && redirectLimit > 0 && worstCaseForwards(runOrder) > redirectLimit;
+  // A limit of 0: the server runs no redirect, so the rules' forwards do nothing.
+  const forwardsIgnored = redirectLimit === 0 && worstCaseForwards(rules) > 0;
   // The edited rule where it is; a new one goes below Bulwark's own rules.
   const editedIndex = editingRule ? rules.findIndex((r) => r.id === editingRule.id) : -1;
   const forwardsOfEdited = forwardsAround(
@@ -583,6 +585,12 @@ export function FilterSettings() {
           </div>
         )}
 
+        {!isOpaque && forwardsIgnored && (
+          <p className="text-xs text-amber-600 dark:text-amber-400">
+            {t("forward_unavailable")}
+          </p>
+        )}
+
         {!isOpaque && tooManyForwards && (
           <p className="text-xs text-amber-600 dark:text-amber-400">
             {t("forward_limit", { count: redirectLimit })}
diff --git a/locales/en/common.json b/locales/en/common.json
index 2c1851a1e..ebf3b2679 100644
--- a/locales/en/common.json
+++ b/locales/en/common.json
@@ -2258,6 +2258,7 @@
       "forward_placeholder": "email@example.com",
       "forward_keep_copy": "Keep a copy",
       "forward_limit": "Forward limit per message on this server: {count}. Extra forwards are skipped.",
+      "forward_unavailable": "This server does not allow forwarding. Forward actions in filter rules have no effect.",
       "reject_message": "Rejection message",
       "reject_placeholder": "Your email has been rejected",
       "label_name": "Tag name",