diff --git a/chatmaild/src/chatmaild/filtermail.py b/chatmaild/src/chatmaild/filtermail.py
index b493bab8..bd5984cd 100644
--- a/chatmaild/src/chatmaild/filtermail.py
+++ b/chatmaild/src/chatmaild/filtermail.py
@@ -34,6 +34,14 @@ def check_encrypted(message):
     return True
 
 
+def check_passthrough(recipient):
+    """Check whether a recipient is configured as passthrough."""
+    passthroughlist = ["privacy@testrun.org"]
+    if recipient in passthroughlist:
+        return True
+    return False
+
+
 def check_mdn(message, envelope):
     if len(envelope.rcpt_tos) != 1:
         return False
@@ -118,6 +126,9 @@ def check_DATA(envelope):
         if envelope.mail_from == recipient:
             # Always allow sending emails to self.
             continue
+        if check_passthrough(recipient):
+            # Always allow recipients marked as passthrough in chatmail.ini
+            continue
         res = recipient.split("@")
         if len(res) != 2:
             return f"500 Invalid address <{recipient}>"
diff --git a/tests/chatmaild/test_filtermail.py b/tests/chatmaild/test_filtermail.py
index df71fd8a..1ffbc965 100644
--- a/tests/chatmaild/test_filtermail.py
+++ b/tests/chatmaild/test_filtermail.py
@@ -1,4 +1,4 @@
-from chatmaild.filtermail import check_encrypted, check_DATA, SendRateLimiter, check_mdn
+from chatmaild.filtermail import check_encrypted, check_DATA, SendRateLimiter, check_mdn, check_passthrough
 import pytest
 
 
@@ -80,3 +80,28 @@ def test_send_rate_limiter():
         else:
             assert i == SendRateLimiter.MAX_USER_SEND_PER_MINUTE + 1
             break
+
+
+def test_excempt_privacy(maildata, gencreds):
+    from_addr = gencreds()[0]
+    to_addr = "privacy@testrun.org"
+    false_to = "privacy@tstrn.org"
+    false_to2 = "prvcy@testrun.org"
+    assert check_passthrough(to_addr)
+
+    msg = maildata("plain.eml", from_addr, to_addr)
+
+    class env:
+        mail_from = from_addr
+        rcpt_tos = [to_addr]
+        content = msg.as_bytes()
+
+    # assert that None/no error is returned
+    assert not check_DATA(envelope=env)
+
+    class env2:
+        mail_from = from_addr
+        rcpt_tos = [to_addr, false_to, false_to2]
+        content = msg.as_bytes()
+
+    assert "500" in check_DATA(envelope=env2)