hello ! working on Mailman 3.3.3 / Debian 11.9 I don't understand these 2 errors :

1. mailman2&3 running, I've created a new MM3 list, and try to send a message, I get this error email : Sorry, we were unable to deliver your message to the following address.

<maliste@listes.leval.info>: 550: 5.1.1 <maliste@listes.leval.info>: Recipient address rejected: User unknown in relay recipient table

2. trying to import a list from MM2 to MM3, I get this error on CLI : mailman import21 formule@listes.leval.info /var/lib/mailman/lists/formule/config.pck Usage: mailman import21 [OPTIONS] LISTSPEC PICKLE_FILE Try 'mailman import21 -h' for help.

Error: No such list: formule@listes.leval.info

Thanks in advance !

Cordialement Pascal Léval

Le 19/03/2024 à 20:19, Odhiambo Washington a écrit :

On Tue, Mar 19, 2024 at 8:26 PM pascalleval--- via Mailman-users <mailman-users@mailman3.org> wrote:

Hello everybody,
I'm trying to migrate my mailing lists on Debian 11 server from
Mailman2 to Mailman3, and I'm having difficulties !
Mailman3 is already functional, but I could not configurate
Postfix for this.
Is there anyone speaking french that could help me ?

Your English is good enough so let's stick with it!

What difficulty(s) are you facing?

Configuring Postfix is in a non-complex setup is pretty easy. It is documented: https://docs.mailman3.org/en/latest/install/virtualenv.html#setup-mta

It's further explained in detail at: https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/docs/mta.ht...

Maybe you can let us know where you are stuck. I am not a Postfix expert, but I have setup MM3 with Postfix  for a number of people and it wasn't difficult. Just take your time and read (and reread) those two links. You can then seek clarification on what you don't understand.

-- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254 7 3200 0004/+254 7 2274 3223 In an Internet failure case, the #1 suspect is a constant: DNS. "Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-) [How to ask smart questions: http://www.catb.org/~esr/faqs/smart-questions.html]

what you have written below worked fine, thanks !

but now, I still have the error sending an email : Erreur : 550 5.1.1 <formule@listes.leval.info>: Recipient address rejected: User unknown in relay recipient table I think it's a problem with Postfix, what do you think ?

Cordialement Pascal Léval

Le 22/03/2024 à 15:13, Odhiambo Washington a écrit :

First, you must create the list in MM3 because the list MUST exist before any operations can be done on it.

1. mailman create formule@listes.leval.info                           # Create the list in MM3 2. mailman import21 formule@listes.leval.info  /var/lib/mailman/lists/formule/config.pck   # Import the list config and members
2. mailman-web hyperkitty_import -l formule@listes.leval.info /path/to/archives/private/formule.mbox/formule.mbox     # import archives 4. mailman-web update_index_one_list formule@listes.leval.info         #update list index