diff --git a/rhodecode/lib/rcmail/utils.py b/rhodecode/lib/rcmail/utils.py
new file mode 100644
--- /dev/null
+++ b/rhodecode/lib/rcmail/utils.py
@@ -0,0 +1,19 @@
+"""
+Email message and email sending related helper functions.
+"""
+
+import socket
+
+
+# Cache the hostname, but do it lazily: socket.getfqdn() can take a couple of
+# seconds, which slows down the restart of the server.
+class CachedDnsName(object):
+    def __str__(self):
+        return self.get_fqdn()
+
+    def get_fqdn(self):
+        if not hasattr(self, '_fqdn'):
+            self._fqdn = socket.getfqdn()
+        return self._fqdn
+
+DNS_NAME = CachedDnsName()
\ No newline at end of file