Can't send e-mail message
Thunderbird will not send e-mail messages anymore sinds three days. It happens suddenly without any changes made to the settings. I have verified all settings with my INternet services provider, including the port assignment for both sending and receiving e-mails and all settings are correct. Receiving of e-mails is working well. My desktop is running Windows 10.
Any suggestions how to resolve this issue?
Thanks in advance, Henk Pichel
ప్రత్యుత్తరాలన్నీ (2)
Thunderbird will not send e-mail messages anymore sinds three days.
Is there any error message?
Please post your Troubleshooting Information.
At the top right of the Thunderbird window, click the menu button 
, then select Help > Troubleshooting Information.
Press the "Copy text to clipboard button" and paste the information into your reply.
Additionally, you could just check what has changed (automatically) on your system lately. See the note about firewall and software updates in the Cannot send messages article - they are a common cause.
Don’t forget to check the status of your email service, e.g. here. Thunderbird does not change settings by itself.