Join us and the lead editor of IRL, Mozilla's multi-award-winning podcast, for a behind-the-scenes look at the pod and to contribute your ideas for the next season, themed: "AI and ME." Mark your calendar and join our Community Call on Wednesday, Aug 7, 17:00–17:45 UTC. See you there!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Cannot send emails on Thunderbird after 115.12.2 update - "Authentification error (VM401)" I use Virgin Media. I can receive emails OK.

  • 1 tontu
  • 0 am na jafe-jafe bii
  • 1 view
  • i mujjee tontu mooy Toad-Hall

more options

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.

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.

Wayne Mery moo ko soppali ci

All Replies (1)

more options

Thunderbird has to send via the smtp protocol, so just because it works from the webmail account does not mean it's working.

That error message means Virgin server does not like whatever you have set up to use for sending from that account.

Please post the following information so we understand the current settings. In Thunderbird Help > Troubleshooting Information Scroll down to 'Mail and News accounts' Copy all the data in that area and then paste it into a reply box in this forum question.

It will tell us what server settings are currently being used and whether you have more than one account.

Helpful?

Laajal dara

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.