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Hello, I’m having the following problem: When I try to add my Outlook email address to Thunderbird for Android, I get the error "Authentication unsuccessful: SmtpClientAuthentication is disabled for the Mailbox." This points to a help article that only describes a procedure using PowerShell—requiring domain admin privileges, which I don't have. Setting up the IMAP incoming server seems to work fine, but the outgoing server refuses to connect. This is just a personal account. The configuration is: Server: smtp.office365.com; Security: StartTLS; Port: 587; Authentication: OAuth 2.0; Username: mymail@outlook.de; Client certificate: None. I also tried the configuration using the server smtp-mail.outlook.com (with otherwise identical settings), but I get the same error. Does anyone have any advice?

I have imported from my Windows desktop program to Thunderbird Android App using the QR code, but existing messages are not appearing, only new ones.

Regards Jim

I was working with my own simple pop3 test server and noticed thunderbird also K-9 and even Gmail seem to send some unstandard commands to the server causing an error. FairEmail however works fine. The server is a simple pop3 for local testing can anybody explain why your email clients are not compatible with pop3 standards perhapse how you deviated from the standard?

Hi Team,

Regarding replying previous email, I have tried several time to attach files or photos, but the app will be closed automatically. Do I need to do any settings for it?

However, for creating new email, there is no problem for attaching files.

Best regards, Tomas

Can't scan QR code from desktop to import settings(mobile). Upon opening Thunderbird for Android I'm shown a window that asks 'Already using Thunderbird on Desktop?' My answer: Yes! There is also a blue button that states 'Import Settings' in the afore mentioned window. I click on the Import Settings button as I have the QR code displayed on my desktop monitor. The next thing I see on my Android (Pixel Pro 10XL) is basically just a picture taking screen where it states: 'Align the QR code provided from Thunderbird Desktop' My problem: there is nothing to line it up with. No little 90' ticks used to outline the corners of a square, nothing. It just looks the same as if I were using the camera app (no little ticks outlining corners of square). So in this case there is nothing in which to line up.! I'm using Thunderbird 151.0 on my desktop and have successfully used the QR scanning on my phone in the past. I can't bypass this window as this is my first time using the app on my phone. Am I doing something stupidly wrong? Any help to resolve this problem would be awesome! Thanks *** as I eluded to earlier, I can't get into Thunderbird on my phone so I don't have the version. So I'll just reiterate my desktop version to fill out this form.

Since a few releases, when composing a message and selecting text, the highlight color is invisible in light mode. In dark mode the highlight color is a light blue. Is there a way to change the highlight color in light mode? Thank you.

I tried to connect to my personal outlook email account on a fresh installation of thunderbird mobile. The setup wizard gave the correct configuration as described in microsoft's official documentation. But the following error occured: Authentication unsuccessful, SmtpClientAuthentication is disabled for the Mailbox.

IMAP is enabled in microsoft's mail account settings on outlook.com.

Unified inbox. Have to delete messages twice (first time only marks them read).

When I delete a message from the Unified Inbox by swiping right (and confirming) it only gets marked as read and not deleted. Have to swipe right once more (and confirm) to make it disappear.

In the normal inbox it is deleted at the first swipe to the right.

Why does it only get marked as read at the first delete in the Unified inbox?

A bit annoying having to delete evey message twice in the Unified inbox.

Hi, I seem to be missing the send button in the Android app. (I do know that it's supposed to be the regtangular shape). When I compose a simple e-mail it is there. But when I want to reply a longer e-mail, it is missing sometimes. For now, I have found no pattern for when it is there and when it's not. I can't click on Alt or anything, since it's on a smart phone.

Hello, when I try to answer a message or forward an e-mail, both the attachment, send and more options buttons are missing. They are there when I compose a new e-mail. What can I do?

Hi Folks, I use, as do others I know, Thunderbird for Android. Recently it has decided that the SSL Certificate it accepts for fetching emails is not valid for sending and requires you to accept and make an exception for the certificate. Has anyone else found this? I have tested the certificate, provided by Lets Encrypt, on several servers all claiming SMTP, POP3 an IMAP offer valid certificates. Yet Thunderbird still claims it is a security threat. Can omeone off an answer please? I am currently helping others accept the certificate.

Thunderbird ofr Android is V18.0

regards Anthony

I have been using Thunderbird for many years. Recently I did a factory reset on my Galaxy AO5s mobile. When I tried to re-install Thunderbird it would not download from 'Play Store'. It asked me to confirm my age - it is actually 92! but then I could'nt installl it. Please help!

How to set up mail verification in the app. I need it every minute. It costs at least 15 minutes. Ver. 18.0 In the web version, you can select starting from 1 minute.