diff --git a/premailer/premailer.py b/premailer/premailer.py
index fc157ee..7cfb186 100644
--- a/premailer/premailer.py
+++ b/premailer/premailer.py
@@ -485,6 +485,8 @@ class Premailer(object):
url.startswith('cid:')
):
continue
+ if attr == 'href' and url.startswith('tel:'):
+ continue
parent.attrib[attr] = urljoin(self.base_url, url)
if hasattr(self.html, "getroottree"):
diff --git a/premailer/tests/test_premailer.py b/premailer/tests/test_premailer.py
index 5cdf6a7..dc7f2c1 100644
--- a/premailer/tests/test_premailer.py
+++ b/premailer/tests/test_premailer.py
@@ -837,6 +837,25 @@ ical-align:middle" bgcolor="red" valign="middle">Cell 2
compare_html(expect_html, result_html)
+ def test_tel_url(self):
+ """if you use URL with tel: protocol, it should stay as tel:
+ when baseurl is used
+ """
+
+ html = """
+
+ Title
+
+
+ 202-555-0113
+
+ """
+
+ p = Premailer(html, base_url='http://kungfupeople.com')
+ result_html = p.transform()
+
+ compare_html(result_html, html)
+
def test_uppercase_margin(self):
"""Option to comply with outlook.com