diff --git a/mailtosesame b/mailtosesame
new file mode 100755
index 0000000..9a3b0d8
--- /dev/null
+++ b/mailtosesame
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+# This script will convert UR1 user mail into UR1 user sesame
+# The first argument should be a file with a mail by line!
+
+MAIL_LIST="${1}"
+UID_LIST="${MAIL_LIST}_uid"
+
+# Test if the given file exists
+if [ -f "${MAIL_LIST}" ]; then
+  touch "${UID_LIST}"
+else
+  printf '%b' "The fist argument should be a file with one mail/line\n"
+  exit 1
+fi
+
+index=0
+while read mail; do
+  index=$((index+1))
+  uid=$(ldapsearch -ZZ -H ldap://ldap.univ-rennes1.fr -LLL '(mail='"${mail}"')' -b "dc=univ-rennes1,dc=fr" -x uid | grep "^uid" | cut -d" " -f2)
+
+  #printf '%b' "${index}: ${mail} -> ${uid}\n"
+  printf '%b' "${uid}\n" >> "${UID_LIST}"
+
+done < "${MAIL_LIST}"
+
+printf '%b' "Please see ${UID_LIST} file\n"
+
+exit 0