diff --git a/tests/instrumentation/mbox-to-imap.py b/tests/instrumentation/mbox-to-imap.py
new file mode 100644
index 0000000..63ff391
--- /dev/null
+++ b/tests/instrumentation/mbox-to-imap.py
@@ -0,0 +1,37 @@
+from imaplib import IMAP4_SSL, IMAP4
+from os import listdir
+from os.path import isfile, join
+import sys
+import argparse
+import mailbox
+
+parser = argparse.ArgumentParser(
+        prog='mbox-to-imap',
+        description='Send an mbox to an imap server',
+        epilog='Just a debug tool')
+parser.add_argument('mbox_path')           # positional argument
+parser.add_argument('-H', '--host', default="localhost")
+parser.add_argument('-p', '--port', default="143")
+parser.add_argument('-u', '--user')
+parser.add_argument('-s', '--password')
+parser.add_argument('-m', '--mailbox', default="INBOX")
+parser.add_argument('-t', '--tls', action='store_true')
+args = parser.parse_args()
+
+mbox = mailbox.mbox(args.mbox_path)
+
+if args.tls:
+    imap = IMAP4_SSL
+else:
+    imap = IMAP4
+
+with imap(host=args.host, port=args.port) as M:
+    print(M.login(args.user, args.password))
+    print(M.select(args.mailbox))
+    for k in mbox.keys():
+        content = mbox.get(k).as_bytes()
+        M.append(args.mailbox, [], None, content)
+        print(f"{k}/{len(mbox)}")
+
+
+