Update 'README.md'

README.md

@@ -17,6 +17,14 @@
 My cheat sheet for commands I have trouble remembering.
 
 ## Converting Emails
+
+### maildir2mbox
+Convert Maildir (our email server format) to Mbox
+```
+pip install maildir2mbox
+python -m maildir2mbox -r travis.cathers cathersmbox
+```
+
 ### EML to MBOX using eml2mbox (email2mbox-git on AUR)
 ```
 cd /path/to/eml/files