1 files changed, 41 insertions, 0 deletions
diff --git a/src/mailman/utilities/email.py b/src/mailman/utilities/email.py
new file mode 100644
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+++ b/src/mailman/utilities/email.py
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+# Copyright (C) 2009-2011 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Email helpers."""
+
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'split_email',
+    ]
+
+
+def split_email(address):
+    """Split an email address into a user name and domain.
+
+    :param address: An email address.
+    :type address: string
+    :return: The user name and domain split on dots.
+    :rtype: 2-tuple where the first item is the local part and the second item
+        is a sequence of domain parts.
+    """
+    local_part, at, domain = address.partition('@')
+    if len(at) == 0:
+        # There was no at-sign in the email address.
+        return local_part, None
+    return local_part, domain.split('.')