Thunderbird sending issue (ISP: Wifirst)

Hello,
I'm bringing this topic back up since these suggestions didn't work for me.

I was okay with receiving, but not with sending, like the previous users, and after tinkering a bit, I finally managed to send my messages.
My settings:

Server name: smtp.wifirst.fr
Port: 25
Connection security: none
Authentication method: password, unsecured transmission

While searching a bit on the internet, I found a message from the Wifirst team that says:
"The required configuration for sending emails from our system
is as follows:

No SSL,

No authentication,

smtp.wifirst.fr

These different options are available in the sending settings of
your email account. "
But reading the rest of the replies, it becomes clear that the smtp does not work, and that to make it work, one had to go through the smtp of another provider.

Here is the site I visited:
http://www.agroparistech.fr/siteetudiants/forum/viewtopic.php?f=26&t=83

Hello,

same problem but in Outlook 2007...

No matter the SMTP, it doesn't work...

I called Wifirst who couldn't solve this issue.

I receive emails just fine, but I can't send them ^^

However, the Outlook Live Connector module works. So I can send using my Live address (MAPI server) but that's not the goal! I have my main address with Neuf and I want to be able to use it.

Everything worked for two months and then nothing the next day. I called Neuf, did some manipulations and still nothing...

Two computers, one of which was reformatted today and neither can get it to work.

To note: during the FIRST setup of a new account, the first send works. After that, nothing on the SMTP connections. Standard error 0x80042109

No filtering, no security like WPA or SSL. (the Wifirst server refuses them)

If someone knows a bit about this, although I'm really not a novice, that would be appreciated ^^

The problem also appears in Windows Mail. Except here, no reception since there's no connection to the SMTP...

Config:

Vista 64
Office 2007
USB Wi-Fi connection and native USB (laptop) on the (shitty) Wifirst network (highly discouraged if there are other choices...)

One detail that puzzled me.
I went to the orange.fr site to check my mobile account and... I was already connected and recognized under a Wifirst account (????????)
Is it possible that a bug on their servers creates a conflict with the mail connection?? (it's not normal that I'm logged in as a Wifirst user at Orange without entering any identifier, without a password, and having never been there before...

Thank you for your responses ^^

I had a problem with Incredimail 2 for sending my messages via wifirst.

I solved it by going to:
options > email accounts > properties > servers > server information / outgoing mail server: smtp.wifirst.fr
Then outgoing mail server / uncheck "My server requires authentication".

Finally:
options > email accounts > properties > Advanced > Server port numbers / uncheck "This server requires a secure connection (SSL)".

There you go, I hope this helps you.

Good evening,
the SMTP you need to use is not Wifirst's, it's your internet service provider's. Here’s a small list taken from the internet:

9 Telecom: smtp.neuf.fr
Alice: smtp.alice.fr / or / smtp.aliceadsl.fr
AOL: smtp.fr.aol.com
Cegetel: smtp.cegetel.net
Club Internet: mail.club-internet.fr
Darty Box: smtpauth.dbmail.com
Free: smtp.free.fr
Freesurf: smtp.freesurf.fr
Gmail: smtp.gmail.com
Noos: mail.noos.fr
Orange: smtp.orange.fr
Tele2: smtp.tele2.fr
Tiscali: smtp.tiscali.fr
Wanadoo: smtp.wanadoo.fr