doc: add muttrc configuration

README.md

@@ -68,7 +68,7 @@ Options:
   -h, --help       Show this help
 ```
 
-### Reporting Spam
+### Reporting spam from command-line
 
 To report a spam email, you can use the `report` command:
 
@@ -76,6 +76,14 @@ To report a spam email, you can use the `report` command:
 cat spam_email.eml | bulkbarrage send
 ```
 
+### Reporting spam from Mutt (or Neomutt)
+
+Add the following code in your `~/.muttrc` configuration file.
+
+```muttrc
+macro index,pager \ez "<enter-command>set pipe_decode=no\n<pipe-entry>bulkbarrage report\n<enter-command>set pipe_decode=yes\n<delete-message>" "Report a spam using BulkBarrage"
+```
+
 ## Configuration
 
 After installation, run `bulkbarrage configure` to set up your user