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

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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.

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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.

all INBOX emails disappeared from one of my email accounts. The other is working fine. Emails that were still open in one of the tabs are also now just an empty tab. --no luck repairing folder or deleting INBOX.msf. If I go to the Charter/Spectrum website the emails are still showing What should I try next?

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.

Trouble connecting to my email provider Time Warner Corporation to send emails using my wifi. They claim I have to be connected to Spectrum to send them using my WIFI and they are not in Massachusetts where I am now for the summer. I get the following message when I try to send one using my wifi:

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: p-impout004.msg.pkvw.co.charter.net cmsmtp 73.238.167.193 blocked. Please see https://www.spectrum.net/support/internet/understanding-email-error-codes for more information. AUP#Out-1130.

I'm using Thunderbird android app for the first time, and configured my mailbox.org account. Incoming mail appears just fine. I've confirmed my outgoing server settings and I get the message 'Outgoing server settings verified'. But when I try to send a message it just stays in my Outbox. I've tried tapping 'Send message' on the Outbox screen but nothing happens. Any ideas?

Cannot send or receive Emails. Seems I am off line. How to go on line? OK when I closed last night. When I go to file, offline, "work offline" check shows. I uncheck it - no change. Look again, it is checked again. Ideas?

This past Saturday (21st) I noticed it was taking longer to get emails from Spectrum. I had to click the Get Messages button several times and eventually the box to put in my password would pop up. After putting it in the emails would finally show up. This continued into Sunday, but by late afternoon I was getting no emails from Spectrum. I tried sending a test email from Thunderbird and got the following error message:

An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: impout007.msg.chrl.nc.charter.net cmsmtp [my IP address] blocked. Please see https://www.spectrum.net/support/internet/understanding-email-error-codes for more information. AUP#Out-1120.

I went to the Spectrum website to look up the error message and found this:

The IP address you’re trying to connect from has an issue with the Domain Name System (DNS). Spectrum requires a full circle DNS for emails to be allowed through. Verify the IP you’re connecting from, and check the IP address to ensure a reverse DNS entry exists for the IP.

At that point I called Spectrum tech support, spent about 2 hours talking to 3 different people, but I got no solution. I was able to verify my IP address is not blocked. I was basically told everything is fine on their end, so I should contact Thunderbird. All of my emails are still on the Spectrum website. I can send and receive on that site. No changes have been made to account settings or my password. I’ve tried to find an answer using Google and Youtube, but nothing so far. I did look on the Thunderbird forum, found a post from someone who was also having trouble with their emails and Spectrum this weekend. I’ve downloaded the latest version of Thunderbird, 153.1. One of the tech people suggested I use the Repair tool in Thunderbird on one of my folders. I wish I hadn’t. I used it on the Inbox folder and all of my emails disappeared in Thunderbird. They’re still on Spectrum’s site. If anyone has an idea for a solution I’d appreciate it.

As I was about to post this I opened Thunderbird and about half of the emails from my In Box have reappeared.

Windows 11 Sending, but not receiving e-mails in two OAuth addresses (one university account, one personalised domain gmail) Can't find 'Incoming Server Settings' to check if they are correct Have selected "manual configuration flow" and restarted Thunderbird

Hi, I just installed Thunderbird on a new computer and was super happy about how easy the setup has become for multiple e-mail addresses - however, I have two addresses where I can send, but not recieve e-mails. One is a university e-mail and one a personalised domain gmail - I used both without trouble in Thunderbird on my previous computer. They are both OAuth and the Outgoing Server Settings are correct, but I cannot find where to adjust Incoming Server settings. I've selected "manual configuration flow" and restarted Thunderbird, but still can't see anything new. Where do I find Incoming Server settings now? Thank you for your help,

Lena

I have been using Thunderbird successfully for sometime and since yesterday there were no new emails in my inbox. This coincided with Thunderbird being upgraded, so I am told. So, I tested by sending an email to myself but TB kept assuming my old email address was valid (died last year) and any attempt to get in and edit my address failed because it kept thinking the old email was was still valid. So, I installed Betterbird, hoping it might work but it copied over my profile, etc and it had the same problem! I guess I could look far another email client but I want to stay with Thunderbird.

Any suggestions please. Robin

“My Spectrum email address is [redacted]@charter.net. Spectrum webmail can send and Thunderbird can't receive or send. The outgoing server is mobile.charter.net and the connection times out. I tested the connection from my computer and ports 587 and 465 both respond successfully. Thunderbird is set to No Proxy. when i tried to send today, it gave me this message, "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) mobile.charter.net timed out. Try again." i contacted spectrum about this and now when i try to send, it says nothing and the message never arrives.

The images attached show the UNREAD button active and inactive; yet I cannot retrieve any of the hundreds of messages that reside in various inboxes.

Is there a setting that I haven't found?

I thought that the app might have been corrupted; so I downloaded a fresh copy then uninstalled the app then installed the fresh copy. That changed nothing

I'm running Thunderbird 154.0 on Win 11 fully updated.

Emails are saved in the Sent folder but are not actually delivered. No error message appears. The problem has persisted since the update to version 153.1.0esr. Everything works perfectly with the beta version. The hosting provider is Strato (Germany).