Thunderbird Community Forum

I'm using 128.8.0esr (32-bit) Thunderbird on Windows 10. I've been using it for a very long time. Last night I was able to send and receive mail via Plusnet.

This morning I was getting the following message when I try to send:

Sending of the message failed. An error occurred while sending mail. The mail server responded: Authentication required. Please verify that your email address is correct in your account settings and try again."

I am the only user in this house. Nothing was changed during the night. I contacted the ISP, they checked all my account settings, none of which have been changed for a long time. All settings were as they expected. The ISP asked me to log into their web mail program and try sending mail. I was able to do this. At this point they ASSURED me that it is therefore a TBird problem.

I am a very experienced PC user. I am totally stuck for ideas.

Martin

All my Thunderbird calendars are show as muted. Never had this in the past. TB version is 136.0 What is the status muted and how is it configured or controlled ?

The last two times I have posted a query here, it was posted twice, even though (to the best of my knowledge) I only hit the 'Submit' button once. This is causing difficulties in receiving & reading replies. Is there a way I can delete the duplicate query from your system, or ask someone to do so? Many thanks.

My wife's Thunderbird account always asks for her password whenever she sends an email. She and I use 2 different computers, both with the same version of Thunderbird, which is the latest version, both with the same build and version of Windows 11, and both with the same outgoing server settings. Yet I never have the same issue when I send emails. Can someone please help us by explaining what my wife needs to do for Thunderbird to stop asking for her password?

My work uses a 3rd party URL "defense" program, so every link that comes to me via e-mail is sent to that "defense" 3rd party, instead of directly.

The Thunderbird "link mistmatch" then activates *every time* I have links at work.

Looking online there *used* to be:

 mail.phishing.detection.mismatched_hosts

but it does not work any more.

None of the "phishing" settings prevent the link mismatch from appearing. I could not find any other "mismatch" settings.

How can I avoid this horrible annoyance???

Alvar

I am automatically filtering messages using the message filter feature.

I cannot open emails that have been sorted into a specific folder. The email list is displayed in the tree on the left, but when I click on the relevant email, the message pane on the right remains completely blank. Although the email has been received, I cannot read its contents at all.

Even if I double-click the email in the list to open it in a new tab, the contents are still not visible.

Emails sorted into other folders display without any issues. I tried right-clicking the affected folder → Properties → Repair Folder, but the issue remains.

Is there a way to fix this?

When I highlight a contact and click "Add to to", nothing happens. Only "collected addresses" will populate the address box. Works fine on my desktop, but not on my laptop. Thanks for your help!!

I have installed Thunderbird on a new Lenovo PC using the latest version of Windows. I have copied the settings manually and correctly from a laptop in to the settings for the accounts on the PC. Thunderbird does not give any errors for collection of email though none are appearing in the inbox. There are messages on the server waiting to be collected.

There is a timeout on the SMTP when trying to send messages so no messages are sent.

I have checked all the settings and they are as follows: POP account port 110 smtp port 587 Using START and normal password authentication for both.

I have tried numerous other permutations of configurations as well as restarting Thunderbird after every change. As I mention these are the identical settings used on the laptops which the PC's are replacing. The PC is connected to the internet via ethernet cable and the internet functions fine.

Any ideas out there or anyone having had a similar experience and found a resolution?

I cannot use thunderbird as it will not accept my password, no matter how many times I tried and changed my password. no place to go to get help ....server imap comcast failed eeehhh gadz what a nightmare.

I have two email accounts in Thunderbird 128.7.0esr. I am using a Windows 10 operating system. I can receive and send email through danielpace4114@hotmail.com; but, with dpace4114@msn.com I can only receive emails. I have attached screen shots of account settings. Please help in very simple terms. I am an old guy! Thank you, Dan

Situation: Thunderbird 128.8.0esr (64-bit) has been performing flawlessly. No problems until I received a security notification that my email account had been accessed by someone quite literately on the other side of the world. And, since I haven’t changed my password in quite a while, I thought, ‘why not go ahead and do it now.’ It seemed like a good idea; not so much.

Prior to changing my password on my GoDaddy outlook.office.365.com email account, I have had absolutely no difficulties in sending and receiving emails from the ‘GoDaddy’ email account nor my gmail email accounts.

After changing only my ‘GoDaddy’ email account password, on the GoDaddy/outlook.offic365 website, I started having negative issues with the ‘GoDaddy outlook.office365’ email account on Thunderbird.

Conditions: At this time I was, and still am, able to send and receive emails on gmail accounts. No difficulties here.

However, I am only able to send emails on the ‘GoDaddy outlook.office365’ email account. I can not ‘Get Messages’ or receive new messages.

I also receive the following ‘notification’: User authenticated but not connected.

I have spent over 18 hours on the phone both voice and text attempting to resolve this issue to no avail.

I was told to change my settings to:

- input: outlook.office365.com. port 993, SSL/TLS, Oauth2 - Output: smtp.office365.com, port 587, STARTTLS, Oauth2

...which I had already set prior to contacting ‘GoDaddy Email Support Team’. After all this I was finally told to “contact Thunderbird to resolve this issue.”

I want to point out, that when I login to the GoDaddy email website via Firefox, I have not issues receiving / sending emails. I also have no issues using the ‘Outlook’ app on my android phone.

In an attempt to possible get a better ‘view point’ on the issue. I closed Thunderbird. Opened up a fresh download of Thunderbird AppImage and opened it in a ‘sandbox’ and ‘setup’ the GoDaddy email account. I still could only send and email. I was unable to ‘Get Messages’.

I have reviewed everything I could find on this forum that even came close to this issue, and, basically nothing changed.

If there is anyone who can provide some guidance, it would be greatly appreciated.

I've set up my Thunderbird account to receive mail from Proton Mail, and it imported all the previous mail, but I'm not getting any new messages. I have checked the settings that I was told to input from Proton Mail Bridge and they are correct. I am receiving mail through Proton.me, but any messages since I initially set it up are not connecting to Thunderbird.

I tried to send a [too big] file to someone. So, I deleted the message from sent and draft, compacted folders both in Thunderbird and from gmail (permanently deleted the trash). I still get the message:

"Warning! You are about to send a message of size 29.6 MB. Are you sure you want to do this?"

every time I send anything from Thunderbird (and every time my laptop connects to a WiFi)

Thunderbird then also (ever time) gives me the two error messages:

"Sending of the message failed. An error occurred while sending mail. The mail server responded: Syntax error, cannot decode response. For more information, go to

https://support.google.com/a/answer/3221692 and review RFC 5321

specifications. 586e51a60fabf-2c6710208efsm2231054fac.17 - gsmtp. Please check the message recipient "" and try again."

and (where I have removed the actual e-mail addressee, for privacy)

"Send Message Error Sending of the message failed. An error occurred while sending mail. The mail server responded: The recipient address <mailto:xx.yy@zz.edu> is not a valid RFC 5321 address. For more information, go to

https://support.google.com/a/answer/3221692 and review RFC 5321

specifications. 46e09a7af769-72bb267b340sm1748154a34.13 - gsmtp. Please check the message recipient ""mailto:xx.yy"@zz.edu" and try again.

I've looked at those URLs, but the "answers" don't help. Any suggestions?

I can't send an email on my att.net account which I've had for years and also I have been using thunderbird email for years.