This python script can help, it reads a blacklist.txt file that contains emails that need to be hold for moderation even if an email comes from someone already subscribed in the list.

The script checks if the incomming messages to a mailing list. If the incomming message's author comes from an in email that is in the blacklist.txt file the script will left moderators to aprove the message.

If the email comes from an email that is not in the blacklist.txt file and the email belongs to someone subscribed in the mailing list, the script will DISTRIBUTE the message.

The script is designed to keep a sympa based mailing list (like mailing list servers used in riseup.net) moderated in that way.

• A precondition for the script is that the mail listing use "Editors can send, others are moderated. (editors_or_moderated)" on "Who can send messages" from email listing configuration interface.

In order to create a default settings-file execute:

$ ./init.sh

The settings values that need to be set on settings.json file are:

• subscribersFile (string) - It's the filename where subscribed users will remain
• debug (boolean) - Wheter or not logs will be displayed on stdout or a logfile
• logFile (string) - Where logs will be stored
• listName (string) - Listname to moderate
• listContactEmail (email) - Email address that sends messages for moderation, it's commonly [listName]-request@lists.riseup.net
• sympaCommandEmail (email) - Email address where commands will be sent, it is used to get subscribed users
• moderatorEmail (email) - Email address that has owner roles on a riseup list
• moderatorPassword (string) - Moderator password
• imapSSLServer (string) - In order to fetch emails, it's necessary to connect to the moderator's email provider IMAP server
• imapSSLPort (integer) - IMAP server port
• smptServer (string) - In order to send emails, it's necessary to connect to the moderator's email provider SMTP server
• smtpPort (integer) - SMTP server port
• blacklistFile (string) - Name of the text file containing emails in the black list (one email per line)

The script works the like this:

• It connects to SMTP server
• Using a moderator (better owner) account, it sends a REVIEW message to [sympaCommandEmail]
• Then it reads the response to that command requests and gets all subscribed users
• It connects to IMAP server and logs in with a modertor account
• Fetch unseen emails from [listContactEmail]
• For all fetched emails the script gets a moderation unique code and a sender email
• If the sender email is subscribed and it's not in the black list ** The scripts sends a DISTRIBUTE [moderation-unique-code] [listName] command via SMTP to [sympaCommandEmail]
• If the sender email is not subscribed or it's in the black list ** The script leaves that message for manual moderation

The riseup list has to send all messages for moderation.