There is no such thing as a Thunderbird email server. Thunderbird is just an email client program running on your computer. You have mail accounts in Thunderbird and they will use whatever server they have been set up to use. Thunderbird facilitates the ability to see various account (email addresses) which may be on different server, so enabling reading and writing of emails.

Check to make sure mailfence has not switched imap/pop/smtp off.

• Logon to webmail account (accessed via a browser)
• Go into your account Settings -> Account -> Security: Services access.
• Please make sure IMAP and SMTP etc are enabled.
• You may need to generate a password when you enable them.

If you use the links to generate new password then you will need to update the stored password in Thunderbird:

• In Thunderbird
• Settings > Privacy & Security
• Scroll to Passwords section
• click on 'Saved PAsswords
• Click on 'Show Password'
• If prompted for windows password - then it means - when you boot/start up computer you get asked for a User Account password to logon to see desktop etc - That is the required password.
• Right click on imap:account....line and selct 'Edit Password'
• clear all contents and enter the new password
• Do the same process for the smtp://account...line to update the password.
• Click on 'Close'

If the actual Thunderbird program crashed then you would need to post the Crash ID. That can be located here:

• In Thunderbird
• Help > TRoubleshooting Information
• Scroll down to 'Crash Reports in the last 3 days' section
• copy an paste the Report ID which begins with a bp-

Crashed is not the same as 'not responding'. The most common reason for a 'Not Responding' error message is usually an Anti-Virus product which intervenes and prevents Thunderbird from accessing files. Basically, access Anti-Virus and set up Thunderbird profile folder as exempt from scanning.

If you are trying to download emails and you get an error message then please post an image that shows the error message OR type the error message Word for Word verbatim.

In Thunderbird

• Tools > Developer Tools > Error Console (Ctrl+Shift+J)
• Click on the bin icon to clear it and close.
• Exit Thunderbird, wait a few moments and then restart Thunderbird.
• Allow it to check for connection and download etc.
• If there is a connection issue - no emails - error etc ...
• Open 'Error Console'
• Expand anything that needs expanding to show more data
• Post an image showing the data.

Q: Are you talking about an imap or pop mail account ? I'm assuming imap unless told otherwise. Check the account server settings are correct. IMAP server settings for mailfence:

• Server name: imap.mailfence.com
• Port 993
• Connection SEcurity: SSL/TLS
• Authentication Method: Normal Password
• Username : your-email@mailfence.com
• Password : Your mailfence.com password

You may need to generate an app specific password and use it instead of your normal password, but Authentication Method must still be set as 'normal Password'

SMTP outgoing server settings

• SMTP Server : smtp.mailfence.com
• Port 465
• Connection Security: SSL/TLS
• Authentication Method: Normal Password
• Username: your-email@mailfence.com
• Password : Your mailfence.com password

You may need to generate an app specific password and use it instead of your normal password

Info copied from mailfence website: Are you using any non-web service i.e., SMTP, IMAP, POP, EAS, xDAV, or instant messaging for groups? Then it is highly recommended to access them using a different password from your account web access. This is the next logical step you should take after enabling 2FA for web access to harden your Mailfence account. You’ll extend the level of security on other/non-web services in use. We recommend you to generate and use service specific passwords, even if you do not enable 2FA. To do so, follow these steps : Go to your account Settings -> Account -> Security: Services access (section) -> click on ‘Generate a specific password for this service’.

This forum is manned by other Thunderbird users in a voluntary unpaid capacity who give their time and knowledge to assist others. No one called 'Manu Andino' has made any Support Forum assistance to any of your questions, so I think you maybe talking about someone on a 'mailfence' forum. You have already asked a question on this only two days ago. Please do not keep repeating identical questions. Please keep all conversations in the question asked otherwise the conversation gets lost, people end up repeating themselves and it wastes time. Only create a new question if you have not had a response for over a week or you are asking a new question on a new topic. As a heads up - do not post personal data like email addresses or telephone numbers because this is a public website. No one sends personal emails not makes phone calls. This comment posted in the Support Forum should send an email via an auto method to you (please note at the time I'm typing this there has been issues and therefore requires people to log on to their forum profile to see questions). Volunteers could be anywhere in the world.

A previous issue also posted at https://support.mozilla.org/en-US/questions/1455590

pbehrmann you should reply in the thread instead of creating new threads as replies.

To reply in a thread that is not locked as in this one https://support.mozilla.org/en-US/questions/1497337, scroll down to the Post a Reply box, type in your reply then click on Post Reply.

Reporter,

You posted a question but may not have seen the email notification(s) for answers that were posted here. Please check the link to this question and read the responses, and post here to let us know whether your problem is solved. Thanks

Did you have good results?

pbehrmann seems to be gone.