Diễn đàn hỗ trợ Thunderbird

In thunderbird when I select Help/Troubleshooting information and than click Open Directory at Profile Directory nothing happens.

Operating System: Fedora Linux 44 KDE Plasma Version: 6.8.2 KDE Frameworks Version: 6.31.0 Qt Version: 6.11.2 Kernel Version: 7.2.13-200.fc44.x86_64 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz Memory: 16 GiB of RAM (15.5 GiB usable) Graphics Processor: Quadro RTX 4000

1. 1. Thunderbird connects to my IMAP/SMTP server but neither receives nor sends mail

I am having a problem with Thunderbird on Windows with a custom-domain email account hosted by Advika Web.

1. 1. 1. Account

Email address: `connect@synergyappstudio.com`

Mail hosting provider: Advika Web

The mailbox and password are confirmed to be valid because I can successfully log in to the provider's webmail using the same email address and password.

1. 1. 1. Server settings provided by the hosting provider

Incoming IMAP:

• Server: `mail.synergyappstudio.com`
• Port: `993`
• Connection security: SSL/TLS
• Authentication: Normal password
• Username: `connect@synergyappstudio.com`

Outgoing SMTP:

• Server: `mail.synergyappstudio.com`
• Port: `465`
• Connection security: SSL/TLS
• Authentication: Normal password
• Username: `connect@synergyappstudio.com`

1. 1. 1. What happens in Thunderbird

Thunderbird shows:

> Connected to mail.synergyappstudio.com

However, incoming messages are not downloaded and outgoing messages cannot be sent.

The SMTP error I received was:

> The connection to Outgoing server (SMTP) mail.synergyappstudio.com timed out.

1. 1. 1. Connectivity tests

I tested the server from Windows PowerShell.

Port 993:

`Test-NetConnection mail.synergyappstudio.com -Port 993`

Result:

> RemoteAddress: 103.69.196.146 > RemotePort: 993 > TcpTestSucceeded: True

Port 465:

`Test-NetConnection mail.synergyappstudio.com -Port 465`

Result:

> RemoteAddress: 103.69.196.146 > RemotePort: 465 > TcpTestSucceeded: True

Therefore, both TCP ports are reachable from my computer.

1. 1. 1. TLS tests

I also tested the actual TLS handshake rather than just TCP connectivity.

TLS 1.2 against IMAP 993 failed with:

> Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

TLS 1.0 against IMAP 993 produced the same result:

> Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

I also tested the TLS handshake against SMTP 465 and received the same "connection was forcibly closed by the remote host" result.

1. 1. 1. Comparison with Outlook

There is an important comparison:

The same mailbox **successfully connects and authenticates in Classic Outlook** using the same server and credentials.

However, I am using Microsoft Office Home & Student, so Classic Outlook is not available to me as a practical permanent solution for this business email account.

Microsoft's **New Outlook** also fails to add the account and displays:

> Sign in failed. Please try again in a few minutes. You may need an app password.

The mailbox does not use Microsoft 365 authentication. It is a conventional hosting-provider IMAP/SMTP mailbox.

1. 1. 1. Thunderbird troubleshooting already attempted

I have:

• Confirmed the password works through webmail.
• Confirmed the supplied IMAP/SMTP server names.
• Confirmed ports 993 and 465 are reachable.
• Confirmed SSL/TLS settings.
• Used Normal Password authentication.
• Used the full email address as the username.
• Tried Thunderbird with the supplied IMAP/SMTP settings.
• Reduced **Maximum number of server connections to cache** from the default 5 to 3 and then to 1. This did not resolve the problem.
• Restarted Thunderbird after changing the connection-cache setting.
• Tried Thunderbird's connection logging, but the generated log files remained 0 KB, so no useful log was produced.

1. 1. 1. Additional observation

Thunderbird displays "Connected to mail.synergyappstudio.com", but the account does not actually synchronize incoming mail.

The provider's webmail works normally, and Classic Outlook works with the same mailbox.

1. 1. 1. What I would like help determining

Could you please help determine whether this is:

1. A Thunderbird IMAP/SMTP compatibility issue with this particular mail server; 2. A TLS negotiation issue; 3. A Thunderbird configuration/profile issue; 4. A Windows/security-software interaction; or 5. Something specific to the mail server's IMAP/SMTP implementation?

In particular, I would like to understand why Thunderbird can establish the connection but cannot complete the IMAP/SMTP communication, while Classic Outlook works with the same server, ports and credentials.

I can provide Thunderbird version information, Troubleshooting Information, screenshots of the account configuration, or any additional diagnostic information you need.

Just tell me how to stop Firefox classifying my received e-mails. I've tried to change the settings but nothing seems to make any difference. I resent this sort of AI interference.

In einem meiner Postfächer sind alle Unterordner verschwunden unter TB. Auf dem Handy kann ich alles sehen, in anderen Postfächern auf dem PC stimmt alles.

Ich habe alle verfügbaren Tips probiert seit ca. 4h.

Im Verzeichnis von heute scheinen alle Daten vorhanden zu sein, siehe Bild. Die Dateien und Ordner von gestern sind aber grösser, siehe 2. Bild. Im Postfach auf TB sind sie aber gar nicht zu sehen.

Was tun?

Gruss, Dirk

Normalerweise habe ich die klassische Ansicht, links die Ordner mit der jeweiligen Gesamtanzahl der E-Mails und rechts alle E-Mails einzeln mit Text aufgeführt. Jetzt seht das nach dem Einschalten von Thunderbird so aus: links nur teilweise die Ordner ohne der Gesamtzahl der E-Mails und rechts eine Ansicht ohne alle E-Mails und nur einzelne Nachrichten, wie Neue Nachrichten verfassen, Nachrichten suchen,Filter für Nachrichten verwalten usw. Manchmal kommt aber die richtige klassische Ansicht zurück, wie jetzt gerade, später ist diese Ansicht wieder weg für längere Zeit. Ein Benutzer hat mir schon geantwortet. Ich habe alles ausgeführt, wie bei Ansicht Haken vor Konten/Ordnerliste. Das Problem besteht aber weiterhin. Ganz oben am Rand stehen bei Suchen die zwei Kästchen - STRG + K, die gehen aber nicht weg. Ich vermute, daß ich irgendwie eine falsche Tast angeklickt habe so daß die richtige Ansicht gehemmt wird. Es isr wahrscheinlich ganz was einfaches, ich weiß aber nicht wie und was tun. Hilfe wäre gut.

Hello My previous computer has crashed. C:/ is not available any more. In my previous computer, I had two hard drives: a C:/-drive (an SSD) where Windows and other software were installed, The second hard drive was a conventional drive (D:/) where I stored all my files, documents, images, and so on. On this d:/ I also had several programs installed including Thunderbird. On that previous computer, I saved and organized my emails into subfolders within Thunderbird.

Is it possible to recover my address book in Thunderbird? Is it possible to find/recover my saved emails? Could they perhaps be saved somewhere on my previous C: or D: drives?

I have an old copy of my C: and D: from 2025 I have also a complete copy of my D: from my old computer.

I have now bought a new computer and installed Thunderbird. I would be very grateful if this could be resolved. Kind regards Anders Quant

I have my operating system, and Thunderbird, set to the America/Vancouver time zone. When Pacific Daylight Time fell back to Pacific Standard Time on 1 November 2026, changing from UTC-7 to UTC-8 hours, our time zone remained unchanged at UTC-7 hours.

Now I observe that the Date column of Thunderbird's Message List display shows the date and time of each message converted into UTC-8. But the message date as displayed in the right part of the header in the message pane is displayed in UTC-7.

For instance, a message with the header `Date: Wed, 04 Nov 2026 09:27:27 +0000` shows in the Date column as "01:27" (today, 4 Nov), but the message date in the right part of the message pane reads "02:27".

I cannot find a control or documentation which governs the time zone used by either the Date column or the message date in the right part of the message pane.

How can I set to time zone used in the Date column of the Message List to use the America/Vancouver (or UTC-7) time zone of my operating system and of the Thunderbird calendar?

First Netscape then Thunderbird, we've been using and recommending Thunderbird for a LONG time, gradually weening customers away from built in clients which become incompatible when hardware or O/S changes. Providing a POP mail service to our customers, Thunderbird has always been at the top of our recommended email client list. The portability of Thunderbird has been a godsend over the years. Especially with customers managing large number of email accounts. I hope the change doesn't result in us we looking for another email client once the new version is launched.

My e-mail stopped working a week ago. I get as far as "connecting to IMAP but then get a "Login to server imap.orange.fr with username [redacted]@orange.fr failed" message. I have changed the IMAP and SMTP passwords several times but none seems to work. What am I doing wrong?

Hi I am at my wits end here - The date in my Thunderbird is behind by 1 hour. This is affecting sent messages and also received messages.

This just started today. For over a year, the time has been correct. I have not changed any settings in Thunderbird prior to this issue.

My Win11 computer shows the date and time correctly.

I had a Win11 update yesterday. Not sure if that has affected Thunderbird (My province - Manitoba Canada - also stopped using daylight time changes in the last couple of months.) We are now permanently CDT, and is UTC/GMT -5 - which is what it shows in my Win11 setting.

My timezone and time in Win11 settings shows correctly.

Just to see if it would make a difference - In Win11 settings->Time & Language - I changed the time zone automatic to off (even tho the time zone showed correctly) and set it manually to UTC-5:00 Manitoba, - I changed 'Set Time automatically' to off, set the time manually and synced the time.

No difference with Thunderbird.

Why is my time off in Thunderbird?, and what can I do or check to fix this?

My current ISP is ntlworld.com. Shortly I will be moving to outlook.com. I want to keep using TB but am not sure how to change the TB settings to switch to Outlook.

What settings do I need to change to do this, please?

Thank you,

Tregarth

I'm not sure at which point this behaviour started, it was either after thunderbird suggested that I compacted my folders or perhaps after the update to the latest Thunderbird version. Sometimes when I start Thunderbird I only get the inbox (which is empty) . Sometimes I get nothing then the inbox gets downloaded from my IMAP account. Sometimes I see all my folders for a few tenths of a second and I see message on the bottom border (where it normally talks of connection to the mail server) but these messages talk of deleting all my folders one by one. On one occasion all my folders were laboriously downloaded one by one (as reported on the bottom line.) Often shutting down Thunderbird and opening again results in all the folders being instantly available (so they must have been there all the time). It sometimes takes a number of shutdown/restart cycles to get the email folders back. Any ideas what is going on and how I can stop it happening? Thank you for getting this far.

My father recently passed away, and both of us have been Thunderbird users for a very long time (Agent Forte before that). Can I move his Thunderbird profile so that it is incorporated into mine, with all his old emails? In my profile, I already have three different email accounts listed, with their own inbox and their own sent box. I would love his emails to be like that, so that I can download emails sent to his address from my profile, but they remain distinctly within that account? How do I do that? Thank you!

I have been using my phone a lot and so I've been getting my email on it. In the meantime however the items have been saved on the server. My computer hard drive crashed and when I have installed Thunderbird I find I have 26 thousand emails!! I would like to delete big hunks of it but how to go about it? Thanks.