Forum zgromaźeństwa Thunderbird za Android

In the recent version (24.0) the signature line option is no longer respecting a carriage return at the end of a line. When entering more than one line for a signature, you cannot enter a return and start a second line.

While the editor accepts this the preview pane and the final result does not respect the return and the lines wrap together. This did not happen with earlier versions. Signatures created with earlier versions continue to operate okay. Only the effort to add a new signature line or edit an existing one is being impacted.

It appears the CR is not being entered or read.

I have been Using Thunderbird for about a month. I have configured three accounts, gmail, outlook and breezelineohio and view mails in the unified inbox folder. This morning I started getting a “Certificate Error – Check your server settings” on my Android phone and tablet. I am unable to get mail sent to my breezelineohio account. Mail to gmail and outlook are working correctly. Also, the thunderbird windows 11 app is receiving mail sent to my breezelineohio account correctly. I only have a problem on the android phone and tablet.

The following is a chat I had with ChatGPT concerning this problem. I have italicized ChatGPT responses.

ME: I'm getting a message on my Android tablet that states that my email client Thunderbird has requested a certificate. It says that agreeing to this request will allow the application to use the certificate with service from now on. Is this something I should be worried about? Is it a scam?

ChatGPT: This is not necessarily a scam, but I recommend that you do not approve the certificate request until we determine why Thunderbird is asking for it.

The message you're seeing on your Android tablet sounds like a legitimate Android security notification.

What does the message mean? When Thunderbird requests a certificate, Android may display a message similar to:

Thunderbird has requested a certificate. Agreeing to this request will allow the application to use the certificate with this service from now on.

This usually means Thunderbird is asking permission to use a digital certificate stored on your tablet.

Digital certificates can be used to:

Verify your identity when connecting to certain email servers.

Authenticate a secure connection to an email service.

Access email services that require client certificates.

However, most ordinary personal email accounts do not require a client certificate.

What should you do? Do not tap Allow or OK yet.

If there's a Cancel button, select it for now.

Do not install any new certificates or enter passwords in response to an unexpected prompt.

Check whether Thunderbird continues to send and receive email normally.

If this is Android's genuine certificate-selection dialog, it is not itself evidence of a scam. However, an unexpected certificate request deserves investigation.

Thunderbird has been known to display certificate requests when an email server asks for certificate-based authentication, even when the user normally signs in with a password.

I have two questions Are you using your Breezeline email account with Thunderbird on your Android tablet, or a different email account?

Does the certificate message show a server name or email address? If so, what does it say?

You can also send me a screenshot of the message.

With that information, I can help determine whether this is a normal Thunderbird security request, a configuration problem, or something suspicious—and whether you should allow or deny it.

ME: I am using my Breezeline email account with Thunderbird on my Android tablet, and the certificate message does show my email address and server name.

ChatGPT: Thank you. That helps narrow down the problem.

Since you're using Thunderbird on your Android tablet with your Breezeline email account, and the certificate request displays your email address and a server name, this may be a legitimate Android security request rather than a scam.

However, I recommend that you do not approve the certificate request just yet.

Thunderbird normally connects to Breezeline using your email credentials and an encrypted connection. It generally should not need a personal client certificate.

One thing I'd like you to check What is the exact server name displayed in the certificate message?

For example, it might look something like mail.example.com.

Please type the server name exactly as it appears. You do not need to provide your full email address.

Once I know the server name, I can help determine whether the request is associated with Breezeline's email service and whether it is safe to approve.

ME: mail.breezelineohio.net And also the mail from the Breezeline does appear to be working properly.

ChatGPT: That's good news! Since your Breezeline email is sending and receiving messages properly in Thunderbird on your Android tablet, I would not approve the certificate request at this time.

The server name you provided, mail.breezelineohio.net, is consistent with your Breezeline email domain.

My recommendation When the certificate request appears, tap Cancel rather than Allow.

Continue using Thunderbird normally.

If your email continues working, there is no immediate reason to approve the request.

Do not delete your email account or change its settings.

I do not see an immediate reason to suspect a scam based on what you've described. However, a matching server name alone doesn't prove that a certificate request is trustworthy.

I verified Breezeline's official settings Breezeline confirms the following configuration:

Setting

Correct value

Incoming server

mail.breezelineohio.net

Incoming port

993

Outgoing server

mail.breezelineohio.net

Outgoing port

465

Security

SSL/TLS

Authentication

Normal password

These settings do not normally require a personal client certificate.

One final question: Does the certificate message appear every time you open Thunderbird, or does it appear only occasionally?

That will help me determine whether we should investigate a Thunderbird setting or simply dismiss the request.

ME: I just started getting this message when I start up both my phone and my tablet. The message reads, Certificate Error, Check your server settings. It just started today on the tablet and the phone. Since both your Android phone and tablet started displaying the same Thunderbird certificate error today, November 8, 2026, that is an important clue.

ChatGPT: I suspect the problem may be with Breezeline's email server certificate rather than either of your Android devices.

Here's why:

Thunderbird was previously working on both devices.

Both devices began reporting certificate errors on the same day.

Both connect to mail.breezelineohio.net.

You haven't reported making changes to either device.

A server certificate may have expired, been replaced, or developed a configuration problem. Thunderbird checks these certificates to ensure it is connecting securely.

For now, do not approve an unfamiliar certificate or accept a security exception. Also, don't uninstall Thunderbird or delete your Breezeline accounts.

What I found I checked for reports of Breezeline problems today. I could not confirm a widespread Breezeline email certificate problem.

I also verified that Breezeline still lists mail.breezelineohio.net as its official Thunderbird mail server.

Breezeline

What I suggest next Because the problem appeared simultaneously on both devices, I would first wait to see whether Breezeline corrects a possible server-side issue.

If the error continues, contact Breezeline and ask whether the SSL/TLS certificate for mail.breezelineohio.net has recently changed or expired.

One important question When you dismiss the certificate error, can you still receive NEW Breezeline email messages in Thunderbird on both your phone and tablet?

I'm asking specifically about new messages, not messages already stored in Thunderbird.

Your answer will help determine whether the certificate error is preventing Thunderbird from connecting to Breezeline's server.

ME: I went to Gmail.com on my Windows 11 PC browser and sent a test email message to my Breezeline account. I went to Breezeline on the PC and the message did show up in the Breezeline browser email. However, the message did not show up on either the tablet or the phone. It did show up in the Thunderbird email client on the PC.

ChatGPT: Your test tells us quite a bit. Breezeline is receiving your email correctly, but Thunderbird on your Android phone and tablet is having trouble connecting to the Breezeline mail server.

Here's what your test established:

Email application

Result

Gmail on Windows 11

Test message sent successfully

Breezeline Webmail on PC

Message received

Thunderbird on Windows 11

Message received

Thunderbird on Android tablet

Message not received

Thunderbird on Android phone

Message not received

What I think is happening Because Thunderbird on your Windows 11 PC works, but Thunderbird on both Android devices stopped working on the same day, I suspect one of the following:

An SSL/TLS certificate compatibility problem affecting Thunderbird for Android.

A certificate change on Breezeline's mail server that Android is rejecting.

A Thunderbird for Android issue involving certificate validation.

This does not look like a typical email scam. It looks more like a technical connection problem.

What I recommend Do not delete or reinstall Thunderbird on either Android device yet. We should first identify exactly why Android is rejecting the certificate.

Let's start with your tablet.

Open Thunderbird on your Android tablet.

When the message "Certificate Error — Check your server settings" appears, look for a button labeled Details, More information, or something similar.

If you see one, open it.

Look for wording such as:

Certificate expired

Certificate not trusted

Hostname mismatch

Unable to verify certificate

My next question When the certificate error appears on your Android tablet, does it give you a Details button, or does it simply display "Certificate Error — Check your server settings" with an OK button?

Once I know that, I'll walk you through the next step. I would prefer to correct the problem without disturbing your existing Thunderbird email accounts.

At this point I terminated the chat. I still have the problem but I can check mail to my breezelineohio account on the Windows 11 Thunderbird app. Any thoughts?

Recently (last week or 2), whenever I delete an email, the unified inbox shows an empty display, but, if I select the three lines and go to inbox and select it, all the expected emails reappear.

Was the email with Reagan.com shut down? Don't think so, I used it 2 -3 weeks ago, it will not work on this android phone

I am unable to receive or send emails. the message I received is to check server settings. I am using an Android tablet and travelling overseas. it worked in Japan but now I am in Amsterdam and have the issue. could it be an issue with the eSIM I am using here

Yesterday while using Thunderbird on Samsung android phone the contents of my inbox completely disappeared. I searched Thunderbird's other folders such as Trash, Spam & Archive et al to no avail. This is disasterous for me. I see from a Goggle search that this is not uncommon.

to recreate the issue.. edit IMAP server content, go to existing account on phone and see that latest messages are not in inbox (they are where expected on webmail and TB[win] desktop).

no manner of refresh, load more, clearing app cache & data, uninstalling and rebooting, reinstalling, import settings, or manual settings will restore the correct inbox list. Only the below, and only with the step of local folder size: all, and the following bug of things not changing back to 100 with that further step. Other android mail apps do not have the issue on the same email account.

left hamburger > select account > settings > account settings > fetching mail > local folder size > change to all > accept. back > back > back > manage folders > inbox > triple dot > clear local messages > clear messages. back > back > settings > account settings > fetching mail > local folder size > change to 100 > accept. back > back > back > dismiss side panel menu > load up to 100 more. That loads in the ENTIRE inbox, not just the recent 100, but the list of messages is at least correct.

I resorted to offline archiving older messages with TB[win] desktop to shrink the server inbox sizes, and thankfully I do have plenty of room at the moment on my phone.

it seems that the android app has some cache or local database that does not clear except with the "clear local messages" - and it does so with a setting bug. Android security doesnt allow me to access the root folders of thunderbird on the device, and connecting the phone to pc with usb doesnt give access to that directory either.

android v15. A dovecot index rebuild is not a good answer - as ONLY TB Android is affected.

I would like to set up an automatic reply to a specific email account so that they receive an email from me immediately and their message is moved to a different file straight away.

I have used and use Thunderbird on the desktop for decades. It's my primary email application. I've donated to support Module.

I installed the mobile app on my Galaxy Z Fold 7 and connected it to two email accounts: Gmail and my own domain.

My experience has been terrible.

Connecting to Outlook specifically was impossible. The app and Outlook were utterly confused and couldn't authenticate.

Conversation view doesn't work.

Notifications don't work.

Email shows up in the Gmail but not Thunderbird.

With conversation enabled, not only can't you read email as conversations, but basic email history/threads don't appear in messages. If you disable conversation view, then they appear. (That was the biggest warning sign that this app is in trouble.)

I could go on. Using Thunderbird Mobile is like living in the Bizarro universe. IIt pains me to say it, but that's been my experience.

I'm a highly experienced user and developer. I've checked all the settings and rechecked. It ain't me. It's the app.

Uninstalling.

My incoming emails that contain extended characters like Smart Quotes are rendering correctly in Thunderbird on Windows, but not on Android. Is this a bug, or a wrong setting?

I have just installed Thunderbird for Android on my nearly new Xaomi tablette, and want to sychronise my adresses and some ancient mails that are in sub folders of mail in. Is it possible? I use Thunderbird on my windows mc's since it came out (as with Firefox. Firefox instantly synchronises everything between my 2 windows mc and my Xaomi phone and tablette), Why can't Thunderbird? It has copied the names of the folders but not the files in them!

Hi,

I installed Thunderbird for Android on a Samsung Z Fold 7 with the latest version of Android and One UI. None of my messages show the thread in the actual message nor do they show the conversation view in the message list. All I get is the single message with nothing else included. Conversation view is selected in my general settings.

Please advise.

Environment:

Thunderbird for Android: 24.0 OpenKeychain: 6.0.4 (60400) Android Version: 17 Andorid Build: CP3A.261005.002.A1

When sending a PGP/MIME-signed message from Thunderbird for Android, the OpenPGP signature becomes invalid when an HTML-formatted signature contains markup that enforces line breaks.

A plain newline in the HTML source does not create a visible line break, as expected because HTML collapses whitespace.

However, adding any of the following causes the signature to become invalid:

The first and second are used to create a normal line break and the third is used to create an empty spacing line.

Inline HTML formatting, such as or <a>, does not cause the problem.

Expected result:

HTML line-break elements should be included in the content covered by the OpenPGP signature, and the signature should remain valid.

Actual result:

The message is sent successfully, but the received OpenPGP signature cannot be verified whenever the HTML signature contains markup for a line break or empty spacing line.

The issue does not occur when the signature contains only text and inline formatting. Raw .eml samples can be provided if needed.

Wouldn't it be a good idea to have a message pop up saying "you are offline".

That way the user would know why constantly tapping the "load 10 more messages" button wasn't working.

In fact pulling down to refresh the message list should also have this check enabled.

What are the arguments against this?