Unable to send from Thunderbird (Outgoing (SMTP) server doesn’t seem to support encrypted passwords)

E-mails
1

Good evening,

For the past week, I’ve been unable to send emails from my Thunderbird mail client.

Here’s the error message:

Sending the message failed.
The outgoing server (SMTP) does not appear to support encrypted passwords. If you have just set up the account, please change the "Authentication method" to "Normal password" in the "Account Settings | Outgoing Server (SMTP)" menu. If it worked before and now fails, please contact your mail administrator or provider.

I haven’t touched this account’s configuration in Thunderbird for months.

I consulted various resources (Thunderbird, …):

  • La doc OVH
  • web searches
  • similar posts on the forum

I tried:

  • switching to STARTTLS
  • disabling antivirus software
  • uninstalling and reinstalling Thunderbird

Nothing helped.

My mail client on my smartphone and the webmail both work perfectly; I receive emails without any issues.

Could someone point me in the right direction or tell me what to do?

Thanks in advance.

2

Hi @Brdn

Can you check what you have in Settings > Account Settings?

Select your outgoing SMTP server, look for the field “Authentication method” and change it to Normal password.

For the server smtp.mail.ovh.net or ssl0.ovh.net, the correct configuration is:

Port: 587 for STARTTLS
Port: 465 for SSL/TLS

Save and completely restart Thunderbird.

Let us know how it goes, cheers.
Sergio Turpín

3

Hello, what did you specify here in the settings of your outgoing SMTP server?

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4

Hello @Brdn

Before trying from your third‑party client, feel free to do a send/receive test directly from the OVHcloud webmail: https://mail.ovh.net/

If sending works, you’re most likely encountering a synchronization issue or an SMTP limitation.
If sending doesn’t work, it would be worthwhile to open a support ticket, and in that case feel free to post the ticket number right here :slight_smile:

Astérix

5

Good evening,

First of all, thank you all.

Well, I tested.

Switch back to a normal password. Restart Tbird. Clear the saved passwords. Remove end-to-end encryption.

And it works again. I will retest end-to-end encryption, there’s no reason it wouldn’t work anymore.

I indeed think it’s a sync error.

Thanks again everyone. Sorry for the delayed response.

6

Hello @Brdn

Good thing the issue is resolved :slight_smile: Feel free to mark the topic as such!

Have a great day

Asterix