diff --git a/emark/message.py b/emark/message.py
index 1d261a3..07d08b3 100644
--- a/emark/message.py
+++ b/emark/message.py
@@ -115,11 +115,6 @@ def update_url_params(self, url, **params):
         if not self.uuid:
             return redirect_url
         site_url = self.get_site_url()
-        # external links should not be tracked
-        top_level_domain = utils.extract_domain(site_url)
-
-        if not redirect_url_parts.netloc.endswith(top_level_domain):
-            return redirect_url
         tracking_url = reverse("emark:email-click", kwargs={"pk": self.uuid})
         tracking_url = parse.urljoin(site_url, tracking_url)
         tracking_url_parts = parse.urlparse(tracking_url)
diff --git a/emark/utils.py b/emark/utils.py
index 60a6ba6..2fd8f91 100644
--- a/emark/utils.py
+++ b/emark/utils.py
@@ -6,10 +6,6 @@
 
 __all__ = ["HTML2TextParser"]
 
-from urllib import parse
-
-import tldextract
-
 
 @dataclasses.dataclass
 class Node:
@@ -126,25 +122,3 @@ def __str__(self) -> str:
         # sanitize all wide vertical or horizontal spaces
         text = self.DOUBLE_NEWLINE.sub("\n\n", text.strip())
         return self.DOUBLE_SPACE.sub(" ", text)
-
-
-def extract_domain(url: str) -> str:
-    """Extracts the registered domain from a given URL.
-
-    If the domain is "localhost", it includes the port number in the returned string.
-
-    Args:
-        url (str): The URL from which to extract the domain.
-
-    Returns:
-        str: The registered domain or "localhost" with port if applicable.
-    """
-    extractor = tldextract.TLDExtract(suffix_list_urls=())
-    extracted = extractor(url)
-    if extracted.domain == "localhost":
-        registered_domain = "localhost"
-    else:
-        registered_domain = extracted.registered_domain
-    if port := parse.urlparse(url).port:
-        return f"{registered_domain}:{port}"
-    return registered_domain
diff --git a/pyproject.toml b/pyproject.toml
index a246542..8d4f0de 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ classifiers = [
   "Framework :: Django :: 5.0",
 ]
 requires-python = ">=3.10"
-dependencies = ["django", "markdown", "premailer", "tldextract"]
+dependencies = ["django", "markdown", "premailer"]
 
 [project.optional-dependencies]
 test = [
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 3760b1b..99076be 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -110,12 +110,3 @@ def test_parse_html_email(self):
             "--------------------------------------------------\n"
             "some footer"
         )
-
-
-def test_extract_domain():
-    assert utils.extract_domain("https://example.com") == "example.com"
-    assert utils.extract_domain("https://www.example.com") == "example.com"
-    assert utils.extract_domain("https://www.example.co.uk") == "example.co.uk"
-    assert utils.extract_domain("https://www.example.com:1337") == "example.com:1337"
-    assert utils.extract_domain("https://localhost") == "localhost"
-    assert utils.extract_domain("https://localhost:8000") == "localhost:8000"