diff --git a/dots/bash/.bashrc b/dots/bash/.bashrc
index 0aa3547..3fcc1cc 100644
--- a/dots/bash/.bashrc
+++ b/dots/bash/.bashrc
@@ -465,14 +465,32 @@ rotl() {
             size=$((size - 25))
         fi
 
-        # https://stackoverflow.com/questions/20871534/concatenate-in-bash-the-output-of-two-commands-without-newline-character
-        { echo "rot +$size: "; rot $size $1; } | tr "\n" " "
-        echo
-        { echo "rot -$size: "; rot -$size $1; } | tr "\n" " "
-        echo
+        # if there is a second argument, only the rotation will be printed
+        if [[ -n $2 ]] ; then
+            rot $size $1
+        else
+            # https://stackoverflow.com/questions/20871534/concatenate-in-bash-the-output-of-two-commands-without-newline-character
+            { echo "rot +$size: "; rot $size $1; } | tr "\n" " "
+            echo
+            { echo "rot -$size: "; rot -$size $1; } | tr "\n" " "
+            echo
+        fi
+
     fi
 }
 
+rotm() {
+    if [[ -n $1 ]] ; then
+
+        datestamp=$(date +%y%m%d)_
+        rotl=$(rotl $1 0)
+        # ${param/pattern/replacement}
+        rotl="${rotl/./}"
+        emailaddress=$datestamp$rotl"@468910.xyz"
+        echo $emailaddress
+
+    fi
+}
 
 # ---
 # mounting