I-Thunderbird Community Forum

This post is more for posterity than asking for a solution because all similar topics ended up being Avast antivirus interfering or something less nefarious. In my case eM client started having this problem first, then I switched to TB, but the same issue here. Of all places, the best clue was found on [[Linux mint|https://forums.linuxmint.com/viewtopic.php?t=213352]] forums. It was a permission problem. Right click on C:\Program Files\Mozilla Thunderbird -> properties -> security. I did two things and not sure which one did it, but they pretty much achieve the same. The Users group in the list only had read permissions so I gave it full access to the folder and checked the option to set the same permission changes to all subfolders. I also added my own personal user to that list and gave that full permissions. Oh yeah, also changed owner to myself from whatever default windows group was there before. Now, do I know the full repercussions of doing this? No. Pretty sure this just created a security hole inside my C drive, but... I don't really care at this point. If I had to fix this again, a solution might be to instruct TB to store the the email files somewhere else rather than where it is installed itself (somewhere less locked down than Program Files).

I have been using Thunderbird on my PC for years and when I got my last PC, I found a article to help me move my files. I am now looking for instructions on how to move my Thunderbird files from the PC to the Mac so I can continue using it as I have been.

I am trying to run Thunderbird on my laptop. I currently have it on my PC and my Phone. I just installed Thunderbird on my laptop and zipped my profile (60GB). I tried to open the zip file to make sure it was good. I could not open it, so i did not transfer it. I was looking for an easy way to get all my email accounts and passwords onto my Laptop. I would appreciate any help. Thanks! Kelly

When I attempt to write/ reply/ reply all/ forward, the toolbar at top shows only the slanted pen symbol and "Write -- nothing below. So no "Send" button. The full toolbar that I am trying to recover is attached which I copied from a second computer. When I write click that "Write" bar at the top, noting in the drop down menu had any effect. Help/About says I am "up to date" running 153.1.0esr (64 bit)

After a re-install of Thunderbird the Message List does not appear in columns, and there is no label bar at the top of the Message List to allow sort by date, sender, topic, etc.

How do I get the Message List to appear in column format again?

Thanks in advance.

A couple of days ago we could no longer send or receive email through Thunderbird. When we try, we get the notification "Connection to server mobile.charter.net to [email address] failed" and repeatedly get the notification that our server connection has timed out. We can send/receive through Charter's webmail site, but not through our Thunderbird email client. Thank you for your help.

THUNDERBIRD 154 - IMAP MESSAGE LIST EMPTY AGAINST MERAK MAIL SERVER 8.5.0

=============================================================

SUMMARY Account sets up successfully. Folder tree enumerates. Message counts and unread counts are correct (folders render bold for unread). No messages are ever displayed in the message list pane, in any folder, regardless of size.

ENVIRONMENT

 Client : Thunderbird 154.0, Windows 10 Enterprise 22H2 (19045)
 Server : Merak Mail Server 8.5.0 (2006), IMAP 143 STARTTLS
 Auth   : CRAM-MD5

SERVER CAPABILITY STRING

 IMAP4rev1 AUTH=CRAM-MD5 AUTH=DIGEST-MD5 AUTH=LOGIN AUTH=PLAIN SORT
 THREAD=ORDEREDSUBJECT UIDPLUS QUOTA ACL NAMESPACE CHILDREN IDLE
 UNSELECT STARTTLS

 Note: no CONDSTORE, LIST-EXTENDED, ESEARCH, MOVE, LITERAL+, SPECIAL-USE.

REPRODUCTION

 1. Add IMAP account (autoconfig finds 143/STARTTLS correctly).
 2. Wait for folder discovery to complete.
 3. Click any folder. Message list pane is empty.

OBSERVED

 - Empty on every folder, including a 7-message folder and a 19-message
   folder, so this is not a volume or indexing-time issue.
 - Reproducible on a brand new profile with only this account configured.
 - All folders confirmed subscribed via Subscribe dialog.
 - Error Console (Ctrl+Shift+J) shows nothing when a folder is clicked.
 - "Run search on server" + Search returns nothing, AND no SEARCH command
   ever reaches the server (confirmed in server log). The request is never
   put on the wire.
 - Setting mailnews.imap.jsmodule=false has no effect.

CONTROL - SERVER IS HEALTHY

 The exact command Thunderbird issues works correctly from curl on the
 same machine, same credentials, same account:

   curl.exe -v -u stem --url "imap://<server>/INBOX" \
            --request "UID FETCH 1:* (FLAGS)"

 Returns all 2932 messages with UIDs and flags. SELECT INBOX reports:
   * 2932 EXISTS
   * OK [UIDVALIDITY 1435733459]
   * OK [UIDNEXT 45598]

 Bounded FETCH (FETCH 1:5 (FLAGS)) also returns correctly.

CONTROL - CLIENT IS OTHERWISE HEALTHY

 CardDAV and CalDAV from the same Thunderbird install to a Nextcloud
 server work correctly - address book and calendars sync fine.
 Outlook (with the same mailbox) reads this server without issue.

LOGGING NOTE

 MOZ_LOG=IMAP:5 produces no log file at all in 154 (tried via batch file,
 as administrator, with Thunderbird fully exited, log path outside any
 redirected folder). The MozillaWiki instructions for IMAP logging appear
 to be out of date.

SERVER-SIDE LOG

 Below: sessions for user "stem" only. Other users on this server have
 been removed, all SASL credential blobs redacted, duplicate sessions
 dropped, sorted by time.

IMAP server-side log - sessions for user "stem" only Server: Merak Mail Server 8.5.0 (2006) Other users and all SASL credential blobs removed.

==========================================================

192.168.191.2 [26EC] 15:33:19 Connected 192.168.191.2 [26EC] 15:33:19 >>> * OK ABC CBA IMAP4rev1 Mon, 24 Aug 2026 15:33:19 -0600 192.168.191.2 [26EC] 15:33:19 <<< 19 capability 192.168.191.2 [26EC] 15:33:19 <<< 20 authenticate CRAM-MD5 192.168.191.2 [26EC] 15:33:19 >>> + [REDACTED-SASL] 192.168.191.2 [26EC] 15:33:19 <<< [REDACTED-SASL user=stem] 192.168.191.2 [26EC] 15:33:19 >>> 20 OK AUTHENTICATE Completed 192.168.191.2 [26EC] 15:33:19 <<< 21 capability 192.168.191.2 [26EC] 15:33:19 <<< 22 select "INBOX" 192.168.191.2 [26EC] 15:33:19 <<< 23 getquotaroot "INBOX" 192.168.191.2 [26EC] 15:33:19 >>> 23 OK GETQUOTAROOT Completed 192.168.191.2 [26EC] 15:33:19 <<< 24 UID fetch 1:* (FLAGS) 192.168.191.2 [26EC] 15:33:19 >>> 24 OK UID FETCH Completed 192.168.191.2 [26EC] 15:33:19 <<< 25 logout 192.168.191.2 [26EC] 15:33:19 >>> * BYE IMAP4rev1 Server terminating connection SYSTEM [26EC] 15:33:19 Disconnected

174.90.223.162 [26EC] 15:33:24 Connected 174.90.223.162 [26EC] 15:33:24 >>> * OK ABC CBA IMAP4rev1 Mon, 24 Aug 2026 15:33:24 -0600 174.90.223.162 [26EC] 15:33:24 <<< EF1 CAPABILITY 174.90.223.162 [26EC] 15:33:24 <<< EF2 STARTTLS 174.90.223.162 [26EC] 15:33:24 >>> EF2 OK STARTTLS Ready to start TLS 174.90.223.162 [26EC] 15:33:24 <<< EF3 CAPABILITY 174.90.223.162 [26EC] 15:33:24 <<< EF4 AUTHENTICATE CRAM-MD5 174.90.223.162 [26EC] 15:33:24 >>> + [REDACTED-SASL] 174.90.223.162 [26EC] 15:33:24 <<< [REDACTED-SASL user=stem] 174.90.223.162 [26EC] 15:33:24 >>> EF4 OK AUTHENTICATE Completed 174.90.223.162 [26EC] 15:33:24 <<< EF5 CAPABILITY 174.90.223.162 [26EC] 15:33:24 <<< EF6 NAMESPACE 174.90.223.162 [26EC] 15:33:24 <<< EF7 LIST "" "*" SYSTEM [26EC] 15:33:24 Disconnected

174.90.223.4 [26EC] 15:39:23 Connected 174.90.223.4 [26EC] 15:39:23 >>> * OK ABC CBA IMAP4rev1 Mon, 24 Aug 2026 15:39:23 -0600 174.90.223.4 [26EC] 15:39:23 <<< HR1 CAPABILITY 174.90.223.4 [26EC] 15:39:23 <<< HR2 STARTTLS 174.90.223.4 [26EC] 15:39:23 >>> HR2 OK STARTTLS Ready to start TLS 174.90.223.4 [26EC] 15:39:23 <<< HR3 CAPABILITY 174.90.223.4 [26EC] 15:39:23 <<< HR4 AUTHENTICATE CRAM-MD5 174.90.223.4 [26EC] 15:39:23 >>> + [REDACTED-SASL] 174.90.223.4 [26EC] 15:39:23 <<< [REDACTED-SASL user=stem] 174.90.223.4 [26EC] 15:39:23 >>> HR4 OK AUTHENTICATE Completed 174.90.223.4 [26EC] 15:39:23 <<< HR5 CAPABILITY 174.90.223.4 [26EC] 15:39:23 <<< HR6 NAMESPACE 174.90.223.4 [26EC] 15:39:23 <<< HR7 LIST "" "*" SYSTEM [26EC] 15:39:23 Disconnected

With the new meadow update when either replying to a message or selecting new message there is no command menu bar to send save as draft etc.... tried several of the commands an setting changes but nothing seems to work - can do cntrl+enter to send and that s about it....

This is the message I get when I try to send a message. Sending of the message failed. An error occurred while sending mail. The mail server responded: <budguinn@charter.net> sender rejected. Please verify that your email address is correct in your account settings and try again.

I have included a screen shot of my server settings.

When using the Unified Inbox to compose a new email, the From address is the Default Address of the first account created in Thunderbird. Presently I am having issues with that addresses server so I want to default any new mail to the Default Address of one of my other accounts. Anyy help with this?

8.24.2026 Incoming emails are showing sender and subject line and date/time stamp. but nothing more. Click on one and no content shows up. Where is the missing content?

I ran the Troubleshooting Mode yesterday which initially "deleted" every email in my Inbox. Last night and into this am, those missing emails have begun to slowly show up in the Inbox. New emails are also coming in today but without any content, as in, their message does not appear when clicked on.

When scrolling down to view older emails from earlier this year, same problem with no content showing up after clicking on item.

Why is this happening? I'm not a developer so need elementary instructions on what I need to do to restore whatever has gone haywire.

After reading my emails, I wanted to look at my address book. I clicked on ADDRESS BOOK and my book was not there. Now, I can't back up to a normal page. The only choice is to go to the taskbar and close that page. Then when I restart Thunderbird, I get the same useless page ! Now how do I get my emails ? PS I cannot get to the HELP page of Thunderbird in order to find the version number, so the number I posted below is probably wrong. But otherwise, I could not SUBMIT my plea for help. I'm really stuck !!

All of a sudden I'm not getting any emails in any of my accounts. I had to delete one of my accounts to change the password because of issues with the provider. The re-added account had about 500+ emails in it and now it shows no emails at all. Also, sending messages has slowed way way down or refused to send.