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Hello All, all of a sudden I cannot send emails anymore. I do receive emails though. I have 4 accounts and none works. I went to account settings > outgoing ... all my accounts are set to SSL/TLS and below OAuth2. What goes into the Username field ... the email address or just my name? When I send a test email to myself the send window keeps going and going .. never sends BTW ... in Server Settings I have the same Authentication and Security as in Outgoing. Please help - I'm not getting anywhere. Also ... what goes into "Manage Identities"? ... just the specific email? or all four?

Thanks

I have Thunderbird 154.0 (64-bit) on Windows 11. When I opened Thunderbird this morning, it originally gave a message that the connection to the email server had failed. Before I had time to look into this, it downloaded a number of emails without headings and sometimes without text. However, Thunderbird on my Android phone, I discovered subsequently, had downloaded all the messages correctly. The problem seems to have now corrected itself for subsequent emails, but is there some way I can force the download of these previous incomplete emails? Also, this is a very recent update to Thunderbird - I think it was installed in the last few days. Is it a problem with the update and is it likely to occur again?

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?

Here is the message I get. Very inconvenient... Sending of the message failed. An error occurred while sending mail. The mail server responded: Too many recipients. Please reduce the number of recipients and try again. AUP#Out-1550. Please check the message recipient "........" and try again.

I have two Charter/Spectrum email accounts (domain is charter.net) set up via IMAP in Thunderbird (latest version) on Windows 11 Pro (also latest version, August 2026 CU is installed). They no longer update; at the moment I see no email in either after 8/27/26 around 5:00pm EDT. Confirmed via Web access there are emails after this point (a couple dozen at least, in each account).

Most recently I've tried repairing the Inbox mailbox for both. No help. Because I did that, Thunderbird now shows no emails in my Inbox even though it'd had hundreds of them before.

Note, I'd noticed the same problem a week ago, had tried fixing it at that time by removing both accounts and adding them back. They worked for a few days but then stopped working again on 8/27 as noted above.

Another oddity: If I go onto synchronization settings (right-click on account name then Subscribe), it shows no folders available to subscribe to. The folder list is empty and the Refresh button is grayed out. It shows it looked up and connected to mobile.charter.net at the bottom of the dialog, so I'd expect it would have retrieved the list of IMAP folders, but apparently it got nothing. And it refuses to get anything.

I assume I can remove the accounts and add them back, but why should this be necessary every few days? Seems bizarre. Thunderbird used to work with these accounts very well but now it seems to have blown up. Who decided this is how IMAP works?

I'm running Thunderbird 154.0 setup with my primary gmail account. If I add a second gmail account and receive email from there, when I reply to that will my response appear to be from my primary or the new, second gmail account?

I finally got Thunderbird to not go to Rogers every time I get email. But now I cannot send any email from any address.When I try to send I get an error message. I cannot add an SMPT server as it will not take it

After returning from a 6 day vacation, my wife attempted to download email from her Yahoo email account. There are nearly 200 messages that have piled up but they aren't moving. I've uninstalled and re-installed TB. I've uninstalled and reinstalled the app password in Yahoo. There is no problem with accessing the email via any web browser. I spent 49 minutes on a tech support call with Yahoo and they have said the problem is with TB because they repeated the same steps I have. I checked firewall settings and the only antivirus program on the computer is Malware Bytes and it's not running in the background.

The version of TB is the most recent as of yesterday. I don't see any sketchy looking emails in the web version of Yahoo Mail when it's opened. It's set up as a POP3 account and has been since Cox Internet gave their email over to Yahoo. I'd appreciate any assistance in resolving this because it's currently above my pay grade and tech support at Yahoo.

I had to recently change my password on my shaw email account. Now thunderbird won't download my emails. I changed the password in the account settings to match the shaw email account password but I keep getting an error message: "Host contacted, sending login information..." and then after a long delay the error message reads "Login to server pop.shaw.ca with username ... failed". Any idea what I'm doing wrong by simply changing the password? I think this happened before and some wonderful human on this forum told me I had to put something before the password or click/unclick a particular box, but I can't find that old answer to my previous question. Thanks in advance for any help someone can offer!

Hello,

I have been using Thunderbird for years without issue, but three days ago, I started having issues.

Now, I don't receive emails when I open Thunderbird. If I delete my password and re-sign in, I receive emails, but cannot send them. Trying to send an email makes Thunderbird ask me to sign in again.

I have two email accounts that I use with Thunderbird. Both accounts have this issue. I have this issue regardless of the network I'm in (work, cell hotspot, or home).

Things I have tried:

• Verified that my IMAP and SMTP settings match the guidance from email servers.
• Verified that my computer firewall is not blocking email.
• Tried connecting on different networks (so different ISPs)
• Deleted and re-entered passwords for each account

Here my current server configuration:

• Email 1 (@gmail.com)

 * Server Name: imap.gmail.com
 * Port: 993
 * Connection Security: SSL/TLS
 * Authentication Method: OAuth2

• Email 1 Outgoing Server:

 * Server Name: smpt.gmail.com
 * Port: 465
 * Authentication Method: OAuth2
 * Connection Security SSL/TLS

• Email 2 (@[university].edu)

 * Server Name: outlook.office365.com
 * Port: 993
 * Connection Security: SSL/TLS
 * Authentication Method: OAuth2

• Email 2 Outgoing Server:

 * Server Name: smtp.office365.com
 * Port: 587
 * Authentication Method: OAuth2
 * Connection Security SSL/TLS

I will greatly appreciate any help you can provide!

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.

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....

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