Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Can't send but can receive messages.

Thunderbird Probleemoplossing
Michal Stanke beantwoord
Madara1
Madara1

Whenever I try to send a message it comes up with the following error message;

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

How can I fix this?

Whenever I try to send a message it comes up with the following error message; Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) xxxxx failed. The server may be unavailable or is refusing Outgoing server (SMTP) connections. Please verify that your Outgoing server (SMTP) settings are correct and try again. How can I fix this?

Bewerkt door Madara1 op

Alle antwoorden (2)

Michal Stanke
Michal Stanke

Hi Madara1.

Thank you for reaching us. Have you set up Thunderbird recently and it does not work from the very beginning, or were you able to send messages before? What is your mailbox provider (the part of e-mail address after @)?

Michal