Thunderbird Tekoha Aty

the default font for writing texts is too small for me to easily read. Yet when I send the message the text size too large, How do I control these font sizes independently

Hello, I have six calendars: five are hosted by one provider, Runbox.com, via SabreDAV, and one is hosted by a different provider, Apple iCloud Calendar. I am periodically seeing the error shown below on multiple calendars during automatic sync.

I have saved a two-day event history from the error console and can provide it on request, along with any other troubleshooting information that may be helpful.

I am technical by nature, but my programming experience was primarily with mainframes rather than personal computers. Could someone kindly help me troubleshoot this ongoing issue?

Thanks in advance.

Bill

10:34:53.958 An error occurred when writing to the calendar House! Please see below for more information. Error code: MODIFICATION_FAILED. Description: If you’re seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view. CalCalendarManager.sys.mjs:949:15

   announceError resource:///modules/CalCalendarManager.sys.mjs:949
   onError resource:///modules/CalCalendarManager.sys.mjs:803
   notify resource:///modules/calendar/utils/calDataUtils.sys.mjs:46
   notify resource:///modules/calendar/utils/calDataUtils.sys.mjs:73
   onError resource:///modules/CalCachedCalendar.sys.mjs:95
   notify resource:///modules/calendar/utils/calDataUtils.sys.mjs:46
   notify resource:///modules/calendar/utils/calDataUtils.sys.mjs:73
   notifyError resource:///modules/calendar/utils/calProviderUtils.sys.mjs:689
   notifyOperationComplete resource:///modules/calendar/utils/calProviderUtils.sys.mjs:662
   notifyListener resource:///modules/CalDavCalendar.sys.mjs:720
   doModifyItem resource:///modules/CalDavCalendar.sys.mjs:794

Here is an additional group of errors from the night before:

23:09:52.245 [calCachedCalendar] replay action failed: <unknown>, uri=https://dav.runbox.com/calendars/908506/bill/, result=2147500037, operation=[xpconnect wrapped calIOperation] 23:09:52.249 calendar: CalDAV: No response status doing webdav sync for calendar House CalDavRequestHandlers.sys.mjs:476:16 23:09:52.249 calendar: CalDAV: No response status doing webdav sync for calendar House CalDavRequestHandlers.sys.mjs:495:16 23:09:52.249 calendar: CalDAV: Error doing webdav sync: undefined CalDavRequestHandlers.sys.mjs:528:16 23:09:52.263 calendar: There has been an error reading data for calendar: House. However, this error is believed to be minor, so the program will attempt to continue. Error code: DAV_REPORT_ERROR. Description: There has been an error reading data for calendar: https://p31-caldav.icloud.com/204954917/calendars/home/. It has been disabled until it is safe to use it. CalCalendarManager.sys.mjs:952:16 23:09:52.263 calendar: There has been an error reading data for calendar: House. However, this error is believed to be minor, so the program will attempt to continue. Error code: READ_FAILED. Description: CalCalendarManager.sys.mjs:952:16 23:09:52.263 [calCachedCalendar] replay action failed: <unknown>, uri=https://p31-caldav.icloud.com/204954917/calendars/home/, result=2147500037, operation=[xpconnect wrapped calIOperation]

I have just been updated to a fibre BT account. My Thunderbird e. mail now refuses to let me send out e. mails, though it receives them correctly. It rejects all recipients. I have checked the outgoing server and the settings are correct. This problem is specific to one computer here, others don't have any problems. Despite refusing to send e. mails, my e.mail service provider, Greenby, has received mail from me this morning which is said to be unsent. What is blocking the server?

somehow i managed to import from one email account to another thinking i would like it but i don't like since it just makes me have same mail in 2 places but i don't know and can't find how to cancel the import, can someone tell me how

Hi , I am using the MacBook Pro M5 which is running with macOS Tahoe 26.5 . I have installed Thunderbird mail with version 150.0.2 . After the initial installation with only one account with few mails in the inbox I found the App opening time is abnormally high & is more than 1 minutes . I have removed the mail App few times & re installed it ( even I have re download the app from net again) , but the problem remain same .

I have removed the old folder & files from - ~/Library/Thunderbird/ , ~/Library/Application Support/Thunderbird/ , ~/Library/Caches/Thunderbird/ , org.mozilla.thunderbird from ~/Library/Preferences/. before the re installation & re started the laptop , but no improvement in results .

Also in mail setting references → Unchecked the option - Enable Global Search and Indexer Disable all Extensions and Themes under Tools → Add‑ons & Themes (No Extensions is installed) .

Just to inform that the apple mail is working fine in this laptop .

After all the above trails the results are same , the app once quit & re start - it takes around 1.5 minutes to open after which the app works normally with out any problem . Please suggest if any solution is available for this problem . Best Regards Gautam Banerjee

Exported ical file from Google Calendar and then went to import into Thunderbird. This previously worked in the same installation. The import failed and the error console displayed the attached message. Restarted Thunderbird. Calendar showed ready and is not read only. Same problem.

AEC=AaJma5sZfYpUynazK8VyE33lRH_bhYfkgyNbT-jfeMG8oD9uyOL3N1Tosw; SID=g.a000-QjMRUuc5NGRZnfIyV62s51uwP092-cAZ8l-W1NxM_OQOZgN1ZGKY_k3Vm6pREDoCBlyZQACgYKAaoSARYSFQHGX2MihkApsKYUVI5U0lvA4IprdhoVAUF8yKocew6am1Lja7MZNJXjVFfV0076; __Secure-1PSID=g.a000-QjMRUuc5NGRZnfIyV62s51uwP092-cAZ8l-W1NxM_OQOZgNPX43hncLJhc0c9GgSYkIaAACgYKAagSARYSFQHGX2MiVuCDvu0O95tPcINGtjsK7xoVAUF8yKqfLIxmqPmELGT_sSxLVwES0076; __Secure-3PSID=g.a000-QjMRUuc5NGRZnfIyV62s51uwP092-cAZ8l-W1NxM_OQOZgNNMUIukZ_cC2aRovR8uD_nQACgYKAQISARYSFQHGX2MiNUm2DNMQYx7VzA1S7UKv0xoVAUF8yKrpSTr_QSJneKhFKn1_w5Fs0076; HSID=Ag17wXgwvE7Vb8FCF; SSID=AlWkvkyqhqjIiu1VT; APISID=qnZLeke_X102EccX/AC5i1OLEtI7XRX3m8; SAPISID=Fvek7Cs2FrTJzyKK/AZ8hkvbenGtCp9Y6_; __Secure-1PAPISID=Fvek7Cs2FrTJzyKK/AZ8hkvbenGtCp9Y6_; __Secure-3PAPISID=Fvek7Cs2FrTJzyKK/AZ8hkvbenGtCp9Y6_; SEARCH_SAMESITE=CgQI-KAB; GOOGLE_ABUSE_EXEMPTION=ID=34426013174f2835:TM=1779949443:C=R:IP=102.91.93.202-:S=ag90j64rusEUCvspsBs_DR4; NID=531=U-dqNSefPCar8BG-3VTiDHvjxeLCRw7n8Xz3kwz3LCUWSX-yZWf9gg1xp9jn-gw_ns9_78OlgXm_IWFRe6gyh3wSfvEaMOR7wlgNAIJ9xuhhpu46nxgHHf5h3DzmXq15tDqzM7vTF8A5hHJbrDBma-vHxEER2rDKA7YcaGl3PTFdleMMjWGvrLV9uMlZa-omAqt2HiWJfZa_nvnKbiFa8Gg01H5aB2GlDQ8GOvAlg6A3pPGlaJmymQ9qOJ5QwcCnW6SA1BtT1DSH1647PneJQ_c_Z7FswC1g0oSEFsZvfwSYdHWn8MfcVAPEDx5upHA1u6IXV-Xi7OwQ3BVMlXHV8PdawxY0Ffufc5oDhLEju76Dr8EXnPeKTwW44oUONQpUORha2nHoowmLYUCKr88-gyC9BlZlwPc8pn_5Bxph2hLv93ToFXuZP1BzaJsAJWbTS_ZrhxOkCRUMHdzRr999wMGYyxIGlOfDtyzVlqVIa1yRD9X1sGKGlKgqqR_8X1gdfkWESSNRo1gNaLNGz4osDv7nXE6m3T0hA658b_CoOsT5q7bGhFGCL6Cz54usoc0abIr7Zu36Hnibn6JzzyK1MS89q36RFTju-9azQUePGvwPKkLNqizS_LF3nrGUMQkHOlUOt5uzcNaWiNqBUBtqpiKRHzzSN-sZQ11yhYGqmmPPOmKDg-Tq8cojdQxxV8aJpY3ZBnF2s1dz_h_HPcbNaHTG; __Secure-STRP=ANmZwa2zc98VItEzdq3ZrrHTEKOdkuRqpeOFs415dJ1HmQPbgLQqkK4je3pQ5X_h88vu1zqBZ6JpV8o1FSNtOUI7_3EgUYyfig; DV=w9sfrGGovEprEAC_7T8lkz2UlBXU5hmI-LVhLnx59gAAACAcuD9TMkTrQAAJhcTY7CRtr7FgAAAEYRqzsH9CszBwAAACKOl0gFWplGAwAAAA; SIDCC=AKEyXzVdkNe0enUIiIlyxu5o3IuFjqdSLtU8Q0TYi-ouaQ2Cj1Vtlb6ncct-tB4nNa-Oizfh; __Secure-1PSIDCC=AKEyXzU3gOn6_YS7E7O7IYRSmx3WOsH3-6C2qHXqwXGdZ76qWT7lpcQ-6vVXDfLjHmGcUEArVw; __Secure-3PSIDCC=AKEyXzXrbE797aBJFty1GVZVT3zRqplkmkT6hq5VXv3nIxwjablaMWaHMZy70n2otklzMvcC

I get your begging for money, you are obviously young, I have donated more money to you already than all my other email providers combined, period, you will allow me to move , remove as much as I want or I can delete you and you lose any future donations, but ticking me off with this we think this is junk crap trying to get more money from me only makes me want to DELETE YOU YOUNG PEOPLE, you act just like your buddy Google, lmk Anthony, or stop the bs

- Linux ver 140.7.1esr (64 bit) my folders are now out of alphabetic order among other things Trash us now under 'T' instead of grouped near the sent folder and my Computer folder has a mind of it's own. It's not under C even after I changed the name. It is just stuck. Wha? tnx

I have moved my Thunderbird data from drive C:\xxx\Thunderbird to N:\xxx\Thunderbird. The Thunderbird program remains on "C:\Program Files\Mozilla Thunderbird" How do I tell Thunderbird to find its data on the N: drive?

     Thank you,    Art Lieberman

Unable to open NEW Email on one click. i need to wait for 4-5 mins to open that email. even i am not able to open on one click which contains Barcode. which email contain barcode its also not reflecting in email and even i need to wait for 4-5 mins to open that email.

Kindly help me for this matter i need to change any settings.

06 May 2026 USA Just to inform users:

All mailboxes and all mail in profile are catastrophically and irretrievably deleted when I: 1. Change the location of the profile folder. 2. Make appropriate change in profiles.ini reflecting the location change. 3. Launch Thunderbird in Offline Mode (launching in OFFLINE mode is the fatal event). 4. Mailboxes will appear during this one launched session

    but

5. If Thunderbird is closed while still OFFLINE, then a re-launch of Thunderbird in any state will reveal

     that all mailboxes and all mail have been deleted.

All mailboxes, and of course, all mail in the profile are catastrophically and irretrievably deleted. I was lucky that I made a backup before changing profile location.

The deletion of mail and mailboxes occur at the close of Thunderbird's OFFLINE state. An examination of the profile folder indicates the destruction has occurred upon closing of Thunderbird in OFFLINE state.

It is not the re-launch of Thunderbird that causes the catastrophic deletion. The deletion occurred when Thunderbird was closed in its OFFLINE state.

To successfully change the profile location I must: 1. Make the change to profile location. 2. Make the appropriate change to profiles.ini 3. BE SURE to make the FIRST LAUNCH of Thunderbird in ONLINE mode--ONLINE only. 4. Once 1,2,3 are done, then Thunderbird does not corrupt the profile folder.

Conditions that MIGHT make my configuration uniquely affected: 1. I use Proton Mail Bridge in conjunction with Thunderbird. 2. My Profile folder is on a network share that is letter-mapped in Windows. 3. I have about 10 email addresses in Thunderbird that are Outlook IMAP, Gmail IMAP, and of course, Proton Mail.

I've been using Thunderbird a couple of years in this configuration with no problems. I just decided to rename my profile. So, this is my first discovery of the problem.