Update README.md

README.md

@@ -1,21 +1,33 @@
-# exchange-mailbox-cleaner
+# Exchange mailbox cleaner
 Cleanup tool for Microsoft Exchange mailbox.
 
 - Homepage: https://github.com/bosodo/exchange-mailbox-cleaner/
 
 You can use it to delete emails from exchange mailboxes, that are not managed by Outlook, OWA or etc. (e.g. technical e-mail accounts).
 You can also export deleted emails to .eml files. (Default option is hard-delete e-mails).
 
+**Dependency**
+
+Python 3.6+. Befoure run, install the required dependencies with:
+```
+pip install -r requirements.txt
+```
+
+**Usage**
 ```
 Usage:
   exch-mbox-cleaner.py <exch-server> <user-name> <user-pass> (--inbox | --inbox-subdir=<directory>) [--days=<number_days>] [--bckp=DIR] [--dry-run] [(--soft | --trash)]
   exch-mbox-cleaner.py (-h | --help)
   exch-mbox-cleaner.py --version
-
+```
+**Examples**
+```
 Examples:
   exch-mbox-cleaner.py exchange.example.org jan_kowalski Password! --inbox --days=180 --bckp='./deleted-emails'
   exch-mbox-cleaner.py exchange.example.org jan_kowalski Password! --days=180 --bckp='./deleted-emails'
-
+```
+**Options**
+```
 Options:
   -h --help                     Show this screen.
   --version                     Show version.