diff --git a/checkdmarc/spf.py b/checkdmarc/spf.py
index dcaaec9..38a3579 100644
--- a/checkdmarc/spf.py
+++ b/checkdmarc/spf.py
@@ -36,8 +36,9 @@
 
 SPF_VERSION_TAG_REGEX_STRING = "v=spf1"
 SPF_MECHANISM_REGEX_STRING = (
-    r"([+\-~?])?(mx|ip4|ip6|exists|include|all|a|redirect|exp|ptr)"
-    r"[:]?([\w+/_.:\-{%}]*)"
+    r"([+\-~?])?"
+    r"(mx:?|ip4:?|ip6:?|exists:?|include:?|all:?|a:?|redirect=|exp:?|ptr:?)"
+    r"([\w+/_.:\-{%}]*)"
 )
 AFTER_ALL_REGEX_STRING = r"\ball\s*[^\s]+"
 
@@ -276,7 +277,7 @@ def parse_spf_record(
     lookup_mechanism_count = 0
     void_lookup_mechanism_count = 0
     for match in matches:
-        mechanism = match[1].lower()
+        mechanism = match[1].lower().strip(':=')
         if mechanism in lookup_mechanisms:
             lookup_mechanism_count += 1
     if lookup_mechanism_count > 10:
@@ -288,7 +289,7 @@ def parse_spf_record(
 
     for match in matches:
         result = spf_qualifiers[match[0]]
-        mechanism = match[1]
+        mechanism = match[1].strip(':=')
         value = match[2]
 
         try: