diff --git a/build.py b/build.py
index 8b13789..3c2c163 100644
--- a/build.py
+++ b/build.py
@@ -1 +1,8 @@
+import re
 
+def validate_email(mail):
+    pattern = re.compile(r"(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)")
+    if re.match(pattern, mail):
+        return True
+    else:
+        return False
diff --git a/build.pyc b/build.pyc
new file mode 100644
index 0000000..ac7e818
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..5497038
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diff --git a/tests/test_validate_email.pyc b/tests/test_validate_email.pyc
new file mode 100644
index 0000000..0ee2c3e
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