Thunderbird Support Forum

In our company, we have recently updated Thunderbird from version 52.3.0 to 115.9.0. Now we have a problem with href links containing file URIs in our messages. We often receive file links pointing to files in our local intranet, which look like this: <a href="file://///intranet.local/dfs/output/movie.mp4" class="moz-txt-link-freetext" moz-do-not-send="true">movie.mp4</a> Up to Thunterbird version 98.0b3 it was possible to open these files by simply clicking the link. But since version 99.0b1 file links don't open any more. Instead, the error console displays the following message: Security Error: Content at mailbox:///C:/Users/username/AppData/Roaming/Thunderbird/Profiles/profilename/Mail/Local%20Folders/Inbox?number=12345 may not load or link to file://///intranet.local/dfs/output/movie.mp4. Fortunately, it is possible to open the link with "Open Link In Browser" from the context menu. But we would like to get rid of this extra click. I already followed the steps in this document: http://kb.mozillazine.org/Links_to_local_pages_do_not_work#Firefox_1.5.2C_Mozilla_1.8.2C_and_newer Interestingly, this document is older than the time, when our problem was introduced into Thunderbird. Consequently, when I follow these steps, file links still don't open in an external application. Instead, they open inside of Thunderbird which is not the desired effect. To put my question in a nutshell: How can I open file links by left-clicking on them, just the way they open, when I right-click on them and select "Open Link In Browser"?

Steps to reproduce: On a Windows computer create a new mail. Press Ctrl-K to insert a link. Enter the following path with username replaced by your windows logon name: file:///C:/Users/username/Documents Save and close the mail. Watch the mail in the drafts folder. Click the link. Nothing happens, but you can see a message in the error console. Right click the link and select "Open Link In Browser". This opens your windows explorer.

Any solution is welcome, even if it's potentially insecure, since our computers don't have any internet access and we can receive internal mail only.

I have not had access to my email since the April 18 Thunderbird update, receiving this error message: "After changing password on an IMAP account, the account could become locked due to too many failed login attempts" How do I fix it? Please email me at jjhpor@gmail.com because my primary email, using Thunderbird, does not work (See above) Thank you Jim Housman

The latest version of Thunderbird has lost the Advanced Search button. I can still access it from Control/Shift/F so the function is still there, but no obvious way of accessing it

I have 6 accounts on cox.net and today in two out of the 6 accounts, emails that I send are not saved and I get a message "Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. The "sent" folders for these two accounts are grayed out. I have verified that the account settings have the right folder as the destination for the sent emails and have checked that all emails should be saved. I also get a message in Thundebird -The current command did not succeed. The mail server for account xxxxx responded [TRYCREATE} Mailbox doesn't exist. Mail goes out but no copy is saved. Only two out of 6 accounts are affected and I didn't do anything to them before this started happening.

I've been a Firefox fan for years. I thought I'd try Thunderbird. I'm in need of some help please as I'm going round in circles.

I am trying to link my btinternet email account to Thunderbird. Thunderbird cannot do it automatically so I have to enter the details manually.

I have all the right settings according to BT: Incoming POP 995, SSL enabled but not StartTLS. Outgoing Port 465, SSL enabled not StartTLS. mail.btinternet.com is used.

The User Name and Password are correct but Thunderbird cannot connect to the account. There are no Firewall issues.

Something is happening because BT have notified me of potential unauthorised access and I have to reset my BT password. Even when I enter the new BT Password Thunderbird cannot link to the account.

Any suggestions as to what might be causing the problem? Thanks.

I had to delete and add back several accounts due to a change in servers (cox.net to yahoo.com). Prior to this I just had the All Folders, Local Folders and below. Now I have the Unified Folders and below, which are essentially a duplicate of the folders in the old All Folders. (See attached image) Not only is it making things confusing but I'm storing duplicate emails and it seems to be affecting performance, Thunderbird now randomly quits and restarts. So, how do I delete either the All Folders or the Unified Folders and move the few sub folders that are unduplicated into the remaining group?

Hi, in the past couple of weeks as I am moving selected emails from my Inbox to their Folders, the remaining emails in the Inbox have disappeared (twice)Most recently this Monday. I was able to have Yahoo recall /restore many of them Wednesday. Then Today Friday April 26; I selected an email in the Drafts Folder to Edit, by selecting the Edit button and it disappeared.

This all seems ODD. I have not changed any settings or done anything different. I have lots of storage on the Hard Drive. Would you kindly assist yours dennis

Hello, I am trying to send emails from my iCloud account and it always fails due to the SMTP server timing out. I've tried making a new app-specific password, deleting and re-adding the account in Thunderbird, and made sure the authentication settings are right, but it still doesn't work. I can connect to the IMAP server just fine.

After importing events from the old ics calendar into the existing CalDav calendar. TB sent invitations out to all attendees, even for past meetings. How to avoid this?

Using windows 10, windows firewall, windows antivirus, Thunderbird 115.9.0 (32-bit)

Can't send from Optimum accounts.

Error message "Sending of the message failed. An error occurred while sending mail. The mail server responded: Spam detected by content scanner. Message rejected (ID 661FD756017B2BC6). Please check the message and try again."

Check outgoing server setting, tried changing authentication method, but got the same error.

I am struggling with Gmail and Yahoo mail account in TB these few days. I hit almost the same errors from both. I generated app password for Yahoo mail, and put it in when setting up new account. For connection security: SSL/TLS For authentication method: tried with Normal password, Encrypted password, and OAuth2 However, I am seeing the expected authentication window pop up when trying the OAuth2. For all three authentication method: errors are always the same --- unable to connect to your IMAP server. I've followed another instruction to change maximum number of server connections to cache into 1 or 10. Error messages were the same imap one. So, what should I do/try for next?

I have been struggling with slowness in Thunderbird in recent months (Windows 11, mid-range Lenovo laptop). There is often a distinct lag during even the smallest operations.

Examples are: selecting an email, closing a tab, typing, calendar events editing.

TB process in Windows usually uses 1000MB RAM. RAM is around 60-70% usage usually. I never have the same slowness issues with other applications.

I tried quite a bit: safe mode testing, removing extensions, compacting folders and more tips. I ended up removing Thunderbird and my profile entirely, and reinstalled the latest version with an empty profile. I just set up my Gmail and other email account. No extensions installed, yet still the same issue.

Could it be that something is still there from a previous install, if I removed my profile?

I've been using Thunderbird in Linux and Windows for years with moderate issues that I was able to resolve, but am now really puzzled. Please help.

I have 3 machines with Thunderbird. A while back I noticed that I had duplicate folders for sent mail (Sent & Sent Mail) and for Drafts. (Drafts and Drafts) I did a search and found a discussion from 2019, but nothing more recent. That one kinda lost me. I just got a new machine and installed Thunderbird again. My Gmail account on the new machine shows the same dual folders. Hopefully someone here can detail a solution in steps for a moron like myself.