Thunderbird Community Forum

I wonder if there is a way to make Tasks in some online calendar to allow syncing? I like the way thunderbird can show its tasks on calendar view, it's great, but it would be perfect if i could sync such tasks to online calendar. I know that probably there were providers for google/outlook (not updated to 139 yet), but I am a bit afraid of them because of full access permissions.

thanks a lot in advance! Thomas

just open Thunderbird on 23-Jun-2025, and just can see "inbox" and "deleted items", all of others email box are lost!! even "outbox" can be found! EMAIL: COMPMANY VERSION OFFICE365 EMAIL But my persional outlook email is ok in Thunderbiard.

I asked our company IT, they did not change any setting in office365 email server. At the same time, I re-set this email in Foxmail, it's ok too and can see all of email box. or do Thunderbiard not support office365 company email any more?

Have 5 email addresses with 2 different servers on my Thunderbird account...2 addresses with "maine.rr.com" and 3 with "gmail". Have no problem with the "gmail", but if try to make a "reply" to any "maine.rr" mail it is "server" rejected with message to "check SMTP settings AUP # Out-1500 and verify email address is correct in account settings". Have gone to account settings but cannot find. How so I resolve?

I have several email accounts. One of these has a calendar linked to Google. I use this for calendar invitations from any of my accounts. However, I need to be able to send calendar invitations from the non-linked account like you can in Outlook. There, each time you add contacts to an invitation, you get an option to send From: Does Thunderbird have this capability? BTW I am not talking about setting default account. I need to be able to select when I create an invitation.

I have two issues that are related to a buggy interaction between Thunderbird and Microsoft's email server.

Issue (1) When I send an email with my Outlook email address (from the Android app or from outlook.live.com, but not Thunderbird), my email address shows up as a jumbled mess in the sent folder on Thunderbird.

It appears to the effect of

IMCEAEX-_O=FIRST+20ORGANIZATION_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+XXXXXXXXXXXXXXXXX+29_CN=RECIPIENTS_CN=XXXXXXXXXXXXXXXX@sct-XX-XX-XXXX-X-msonline-outlook-6f06c.templateTenant

(I have masked some potentially sensitive information).

In the sent folder on my Outlook Android app, my email address looks normal. It also looks fine on a browser in outlook.live.com. However, it's in the sent folder on Thunderbird that my email address is a mess.

Issue (2) When my Outlook email address is involved, the sending and receiving email addresses in the "correspondent" field are swapped in Thunderbird.

There are a couple situations where this swap happens:

1. Sending an email with my Outlook email account (either through the Android app or outlook.live.com, but not Thunderbird). In my Outlook sent folder on Thunderbird, the "correspondent" field shows my jumbled email address and not the receiving address, such as bob@gmail.com. Likewise, In the inbox of the receiving email account (such as bob@gmail.com) on Thunderbird, the "correspondent" field shows bob@gmail.com and not my Outlook email address.
2. Sending an email with any other account in Thunderbird to my Outlook email address. In my Outlook inbox on Thunderbird, the "correspondent" field shows my Outlook email address (this time unjumbled) and not the sending email address. However, in the sent folder of the sending email account in Thunderbird, the "correspondent" field shows up correctly (i.e., my Outlook email address).

These two issues are perplexing and probably related. Thank you for any help!

I have a couple of hundred filters and one of them occasionally kicks in and unexpectedly moves certain messages to a new folder but I can't figure out which filter it is. Rather than me going through every filter manually, can't Thunderbird tell me which filter affected a given message? I'd like to be able to right-click a message and be shown the exact filter(s) which affected it.

Updated from 138.xx to 139.02 today.

Archiving from either of my two feed (RSS) accounts doesn't work right. I click archive button, instead copies to the archive folder of first email account in list.

Used troubleshooting mode to disable addons, still happens. Saw nothing in changelog to explain this.

A bug?

Since 5.18.2025 I get a "no message found" in my sent folders and other folders. "Find" will still find the messages and they can be opened, but I can't get the email folders to display. I know they are still there. Version 128.10.2esr. How can I get them to display in the folders?

Can I use Thunderbird to build an incremental local backup/archive of all messages transiting (incoming/outgoing) a webmail account ?

Any idea how to achieve this ?

My problem is:

• A POP3 account will miss all folders except the Inbox. (It's a pity that POP4 has not gained traction yet.)
• An IMAP account creates a mirror, not a backup. Remote deletions in the webmail account must not delete messages from my backup and vice versa.

detailed requirements:

• one-way sync only, since a local backup/archive must be built, not a mirror (two-way synchronization):
• Remote deletions must not cause local deletions (otherwise it would be a mirror, not an archive/backup).
• Local move/delete operations must not be reflected back to the mail server.
• Read‐only access to the mail server: no moves, deletes or flags remotely.
• All messages in all folders must be included in the backup: Inbox, Sent, custom folders, etc. Since POP3 can only back up the Inbox, I will probably have to settle for IMAP to include all folders.
• No duplicates: Messages must not be stored locally more than once.
• Messages must be stored as full offline copies locally (not just headers).

hello I left account A (Google) and I am mainly using account B (Google) now. However, when I search for the mail of account A, it only shows the result, but after clicking it, it shows that there is no mail. How can I recover it? This is because the most important mail is in account A. PLEASE HELP ME....

Hello!

We use some filters in thunderbird to manage messages redirection to other mail-boxes. When message body contains any image, it disappears after redirection via filter rule.

When you forward same message to the same person by hands - works great, nothing is missing.

Can you help with any suggests / advises for thunderbird client config to fix this?

We use Thunderbird 115.5.0 (64-bit).

Thank you.

I know this question has been asked before, but haven't been able to resolve the issue - I have in my Trash folder, the Spam and Draft folders there, no idea how they got there. I use multiple computers and have the same issue on all. I am running Thunderbird 128.11.1esr (64 bit) on my desktop, which is Linux Mint.

If there are any suggestions on how to move the folders back to their original location, would be good, unless I have to now live with it.

Thanks, V1King

On my new laptop (Acer Aspire) I set up my gmail account without a problem, but T-bird will not set up my business account (on my domain, hosted by midphase/stackmail). I used all the settings from my t-bird account on my old laptop, but nothing I try works. I get a yellow box with the message "Unable to log in at server. Probably wrong configuration, username or password". I also tried lettting Thunderbird find the settings; they didn't work either.

What next?