Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Thunderbirs SMTP error

  • 1 reply
  • 2 have this problem
  • 23 views
  • Last reply by benheuser

benheuser
benheuser
more options

Since this morning I am unable to send Mail via Thunderbird. I am getting the error message:

'Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) securesmtp.t-online.de failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again'

I can still receive emails and I can send emails with the same outgoing server settings from a mobile device in the same WIFI. I tried re-adding one of the accounts. This problem occurs on all my email accounts.

I am working on Ubuntu 20.04 and have installed Thunderbird version 102.9.0.

Since this morning I am unable to send Mail via Thunderbird. I am getting the error message: 'Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) securesmtp.t-online.de failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again' I can still receive emails and I can send emails with the same outgoing server settings from a mobile device in the same WIFI. I tried re-adding one of the accounts. This problem occurs on all my email accounts. I am working on Ubuntu 20.04 and have installed Thunderbird version 102.9.0.

Chosen solution

The problem resolved itself after a few hours. I still don't know the reason.

Read this answer in context 👍 0

All Replies (1)

benheuser
benheuser Question owner
more options

Chosen Solution

The problem resolved itself after a few hours. I still don't know the reason.