tried these replacing the sample with correct info for my server

python wblist_admin.py --add --blacklist 172.16.1.10 user@domain.com
and
python wblist_admin.py --account user@mydomain.com --list --blacklist

neither worked still can get email from the user i specified to test.

I think so it's in my plugins line

# Enabled plugins.
plugins = ["reject_null_sender", "greylisting", "throttle", "amavisd_wblist",

got it to work and applied the blacklist with

python wblist_admin.py --add --blacklist email@thedomain.com

but its not blocking the emails what its doing is sending them to the users spam boxes
with subject ***SPAM*** (subject here)

i want to outright stop the sending from going through and if possible send back a response to the sender saying it was blocked.

like i did for my attachments when emailed a exe bat ect... it gets blocked fully not going to the inbox and sender gets notified saying attachment blocked email not delivered.

I got it to work with postfix it fully blocks the sending of the email and it specifies a reason

cd /etc/postfix

nano sender_access
email@domain.com REJECT you are not welcome here
postmap hash:sender_access

nano recipient_access
email@domain.com REJECT you are not welcome here
postmap hash:recipient_access

nano main.cf
smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access
smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/recipient_access

/etc/init.d/postfix restart

havnt tested from external yet as i did this on a testbox local but it blocks emails locally from a user like user1@domain1.com to all on domain2.com or all others on domain1.com running on the testbox server it didnt break anything so going to try it on my main mail server see what it does.  ill report back if this fixes my issue or not

Update: IT WORKED! POSTFIX DID IT. it blocks the address fully and sends them back a error saying why here is a output from a bounceback email it sends

--
This Message was undeliverable due to the following reason:
Ce message ne peut pas être livré pour la raison suivante:

Each of the following recipients was rejected by a remote mail server.
The reasons given by the server are included to help you determine why
each recipient was rejected.
Chacun des destinataires suivants a été rejetée par un serveur de messagerie distant.
Les raisons invoquées par le serveur sont inclus pour vous aider à déterminer
pourquoi chaque destinataire a été rejeté.

    Recipient: <sendingto@domain1.com>
    Reason:    5.7.1 <spammer@blockeddomain.com>: Sender address rejected: you are not welcome here
--

would recommend you guys at the iredmail team look into this method i used in case someone else is looking for same solution for blocking a sender. it works perfectly just have to remember to hash files and restart postfix to apply it.

this issue is now SOLVED!

the amavisd_wblist way didnt solve my problem but it was good to know so now i can add senders to users spam inboxes too

i dont want to change anything on my server its working now the way i want it to, its a clean install all i did was create domain and users then add my smtp relay provider to main.cf in postfix main.cf

do the header_checks to block attachments and now my senders_access to block addresses

havnt done much of anything else. i did try
python wblist_admin.py --add --blacklist mail@domain.ca
but it didnt work it sent to spam so i did
python wblist_admin.py --delete --blacklist mail@domain.ca
to remove it

and have ran this command to fix emails taking 4 hours to arrive in my inbox from some domains

python /opt/iredapd/tools/greylisting_admin.py --disable

attached in a text file is the postconf output

sender and recipient access files both have entries like this again i take out personal details but format is the same
same thing in both sender and recipient are both pretty much the same just a slightly different error message for well sender vs recipient getting the error.

and have a line commented out with # as its not needed right now just testing and it did work

recipient_access file content:
emailaddress@domain.com REJECT this is the error message they get back if they are blocked
# domain.com REJECT this error message will show to anyone who trys to send from that domain

sent the email from blacklisted user: user1@testdom.com to user2@testdom.com and it went to spam not blocked of user2

attached is the log file for iredapd and a screenshot of user2 inbox

there is something wrong in your 0.9.4 release then

I just did a fresh install on a VM tried it and same result blacklist applied and it goes to spam not blocking it
take the user off blacklist messages go to inbox.

sender_access
and recipient_access
did the job for me though and i was able to specify a reason for the reject too like with attachments
like i asked for if possible, the blacklist blocking doesnt supply the sender with a reason why it was blocked.

good bit of info for you to know, incase others need the same kind of blocking.
add it to your script of things you say. good info to have.