diff --git a/Server/src/config/config.xml b/Server/src/config/config.xml
index a4ee28ed..42bea2a3 100644
--- a/Server/src/config/config.xml
+++ b/Server/src/config/config.xml
@@ -80,7 +80,7 @@
                pollerConfigBase.outboxdir="$properties.storageBaseDir$/outbox/$partnership.receiver.as2_id$"
                pollerConfigBase.errordir="$properties.storageBaseDir$/outbox/error/$date.yyyy$-$date.MM$-$date.dd$/$partnership.receiver.as2_id$"
                pollerConfigBase.interval="5"
-               pollerConfigBase.defaults="sender.as2_id=$partnership.sender.as2_id$, receiver.as2_id=$partnership.receiver.as2_id$"
+               pollerConfigBase.defaults="sender.as2_id=$partnership.sender.as2_id$, receiver.as2_id=$partnership.receiver.as2_id$, name=$partnership.name$"
                pollerConfigBase.sendfilename="true"
                pollerConfigBase.mimetype="application/EDI-X12"
                pollerConfigBase.process_files_in_parallel="false"
diff --git a/Server/src/main/java/org/openas2/params/MessageParameters.java b/Server/src/main/java/org/openas2/params/MessageParameters.java
index cd26c1b1..65fd3284 100644
--- a/Server/src/main/java/org/openas2/params/MessageParameters.java
+++ b/Server/src/main/java/org/openas2/params/MessageParameters.java
@@ -13,6 +13,7 @@
 public class MessageParameters extends ParameterParser {
     public static final String KEY_SENDER = "sender";
     public static final String KEY_RECEIVER = "receiver";
+    public static final String KEY_NAME = "name";
     public static final String KEY_ATTRIBUTES = "attributes";
     public static final String KEY_HEADERS = "headers";
     public static final String KEY_CONTENT_FILENAME = "content-disposition";
@@ -29,6 +30,15 @@ public MessageParameters(Message target) {
     public void setParameter(String key, String value) throws InvalidParameterException {
         StringTokenizer keyParts = new StringTokenizer(key, ".", false);
 
+        if (keyParts.countTokens() == 1) {
+            if (key.equals(KEY_NAME)) {
+                getTarget().getPartnership().setName(value);
+            } else {
+                throw new InvalidParameterException("Unsupported key identifier", this, key, null);
+            }
+            return;
+        }
+
         if (keyParts.countTokens() != 2) {
             throw new InvalidParameterException("Invalid key format", this, key, null);
         }
diff --git a/Server/src/test/java/org/openas2/processor/receiver/PartnershipNameRoutingTest.java b/Server/src/test/java/org/openas2/processor/receiver/PartnershipNameRoutingTest.java
new file mode 100644
index 00000000..939f148e
--- /dev/null
+++ b/Server/src/test/java/org/openas2/processor/receiver/PartnershipNameRoutingTest.java
@@ -0,0 +1,91 @@
+package org.openas2.processor.receiver;
+
+import org.junit.jupiter.api.Test;
+import org.openas2.Session;
+import org.openas2.message.AS2Message;
+import org.openas2.message.Message;
+import org.openas2.params.InvalidParameterException;
+import org.openas2.params.MessageParameters;
+import org.openas2.partner.Partnership;
+import org.openas2.partner.XMLPartnershipFactory;
+
+import java.lang.reflect.Proxy;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * Verifies that a poller whose "defaults" include the partnership name (e.g.
+ * "..., name=$partnership.name$") resolves that partnership by name, so that several partnerships
+ * between the same sender and receiver AS2 IDs can each send with their own configuration instead
+ * of all using the first partnership that matches the ID pair.
+ */
+public class PartnershipNameRoutingTest {
+
+    private static final String DEFAULTS = "sender.as2_id=MyCompany_OID, receiver.as2_id=PartnerA_OID";
+
+    private static Partnership partnership(String name, String subject) {
+        Partnership p = new Partnership();
+        p.setName(name);
+        p.setSenderID(Partnership.PID_AS2, "MyCompany_OID");
+        p.setReceiverID(Partnership.PID_AS2, "PartnerA_OID");
+        p.setAttribute(Partnership.PA_SUBJECT, subject);
+        return p;
+    }
+
+    private static AS2DirectoryPollingModule poller(String partnershipName) {
+        XMLPartnershipFactory factory = new XMLPartnershipFactory();
+        List<Partnership> partnerships = new ArrayList<Partnership>();
+        partnerships.add(partnership("MyCompany-to-PartnerA", "first config"));
+        partnerships.add(partnership("MyCompany-to-PartnerA-alt", "second config"));
+        factory.setPartnerships(partnerships);
+
+        Session session = (Session) Proxy.newProxyInstance(Session.class.getClassLoader(), new Class<?>[]{Session.class},
+                (proxy, method, args) -> "getPartnershipFactory".equals(method.getName()) ? factory : null);
+
+        AS2DirectoryPollingModule module = new AS2DirectoryPollingModule() {
+            @Override
+            public Session getSession() {
+                return session;
+            }
+        };
+        String defaults = DEFAULTS;
+        if (partnershipName != null) {
+            defaults += ", " + MessageParameters.KEY_NAME + "=" + partnershipName;
+        }
+        module.setParameter(MessageBuilderModule.PARAM_DEFAULTS, defaults);
+        return module;
+    }
+
+    @Test
+    public void pollerUsesItsOwnPartnershipWhenAnotherSharesTheSameIds() throws Exception {
+        Message msg = poller("MyCompany-to-PartnerA-alt").buildBaseMessage("test.edi");
+
+        assertEquals("MyCompany-to-PartnerA-alt", msg.getPartnership().getName());
+        assertEquals("second config", msg.getSubject());
+    }
+
+    @Test
+    public void pollerWithoutPartnershipNameStillResolvesByIds() throws Exception {
+        Message msg = poller(null).buildBaseMessage("test.edi");
+
+        assertEquals("MyCompany-to-PartnerA", msg.getPartnership().getName());
+        assertEquals("first config", msg.getSubject());
+    }
+
+    @Test
+    public void unknownPartnershipNameFallsBackToIdLookup() throws Exception {
+        Message msg = poller("no-such-partnership").buildBaseMessage("test.edi");
+
+        assertEquals("MyCompany-to-PartnerA", msg.getPartnership().getName());
+    }
+
+    @Test
+    public void unsupportedSinglePartKeyIsRejected() {
+        MessageParameters params = new MessageParameters(new AS2Message());
+
+        assertThrows(InvalidParameterException.class, () -> params.setParameters("foo=bar"));
+    }
+}