Thunderbird Support Forum

After updating to Thunderbird version 115.12.2(32 bit) two days ago, I can no longer send emails. I get an error message "Authentification error (VM401)" I use Virgin Media. I can receive emails OK. I have not changed any server settings for a long time. I have been in touch with Virgin Media, they say the problem is with Thunderbird as I can send emails from on their one line system. I can also send emails from my Android phone. Any help would be appreciated.

Verzenden van het bericht is mislukt. Er is een fout opgetreden bij het verzenden van e-mail. De mailserver antwoordde: Unable to relay without authentication.. Controleer of uw e-mailadres juist is ingesteld in uw accountinstellingen en probeer het opnieuw.

I occasionally get a Authentication Failed to Server (Outlook.com) and when it occurs it continues for 1-5 minutes then goes away again.

Is there any error logging proceedure that I can set up to see what the exact issue is?

I've tried running a parallel alternative email client (eM Client) and that doesn't seem to suffer in the same way, but I much prefer Thunderbird so would like to find out what the problem is.

Attachments in pdf format are covered with green color. The color disappears, for example, when I open printing setup window. I have arleady repaired the folder and fully reinstalled thunderbird. Do you have any ideas how to repair it?

Hi, i have a PEC account configured on 2 different computers, when i forward a mail, near the message appears a blue mark, but in the other computer didn't appear, so my colleague cannot tell if i forwarded the mail or not, can you help me? this problem is only with PEC accounts, with normal mail works correctly, this problem came out some months ago, before worked also whit the PEC accounts

Hi,

I have problem,

sometimes when I send an email, the program loads a completely different email and then saves it as sent,sometimes when I send an email, the program loads a completely different email and then saves it as sent. On the email provider's website, everything is correct, but unfortunately there is an error in the program. This comes up to me often.

can you help me somehow?

Regards

Patryk

I'm grateful that I've been able to use Thunderbird for free up until now. I wouldn't mind making a small donation. However, Thunderbird's email service is currently unavailable. Received emails are not displayed in the inbox. All previous history has also been erased. First of all, I would like your cooperation in fixing the current problem and restoring the system to its previous state. I will make a donation as soon as the system is restored. If the system cannot be restored without a donation, you can make a donation first. I look forward to your reply.