Thunderbird for Android Community Forum

Sometimes I got a problem with Gmail where I get the error "Too many simultaneous connections", both desktop and Android. I found that Gmail servers support 15 connections. I could reduce the number of connections for desktop in the config editor, but I would like how to do that in the Android app. Some times it creates a lot of connections, and I think the numbers stack up together with dead connection when I reboot my router and get a new IP, so I'm wondering how to set to get just one or two simultaneous connections on Android.

I cannot connect my gmail account to Thunderbird for Android (although no problem whatsoever in Thunderbird for Computer). It always fails when Thunderbird tries to connect the SMTP outgoing server. Then it says after a while NETWORK ERROR failed to connect to smtp.gmail.com .... I am using the standard IMAP configurations. Please help.

I am unable to send emails from android Thunderbird, I have something called a unified mailbox plus 2 that have my correct email address. When I send an email it sits in the outbox of the first one with my correct email address and won't send even after selecting send messages. Why do I have a unified mailbox plus 2 others? Thanks

Hello, I can't find a way to connect my contact database to Thunderbird for Android. How can I set this up so that email addresses can be easily added or imported automatically in the entry fields of a new email? Thanks in advance! Regards

Since the last update (I am running K-9 Mail v17.0 on a Moto G Stylus 5G 2023 with Android 14 Build Number U1TGNS34.42-86-4-5-4-8), I am often getting a separate notification for every new email in my In Box (POP3) instead of one notification to say that I have a bunch of new messages, and the notification(s) is(are) not going away after I look at my message(s) and delete the email(s).

Any idea if this is a bug or a feature? It is annoying to delete 10 emails and then have to delete 10 notifications about the same 10 emails.

Thanks in advance for your thoughts.

On Samsung S10e, after install of ThunderBird mobile, transfer of email setup from laptop via QR code gets the message shown in attachment when setting up gmail accounts. Laptop has no issues with ThunderBird accessing gmail accounts. Please describe full process to access gmail on TB mobile when this message appears. Thanks, Malc

I got these instructions from Charter.

How to set up Spectrum Email on third-party clients

Dear Spectrum customer,

Here's some helpful info you may find useful after our conversation.

You can easily set up Spectrum Email on your cell phone, laptop or other mobile devices.

To get started, make sure you have the following settings:

   Username: Your full Spectrum email address

   Password: Your Spectrum email password

   SSL: On

   Protocol: IMAP

   Incoming Server Port: 993

   Outgoing Server Port: 587

   Requires Authentication: Yes, or checked

You'll also need to enter your incoming email server and outgoing email server. The server that allows you to send mail is the outgoing or SMTP server. The server that lets you receive mail is referred to as an incoming, POP or Mail server. Those will vary based on your domain, which is the part of your email address that follows the @ symbol, such as charter.net.

The problem is with connection security. The only 3 choices you offer are none, start tls or ssl/tls If you add a choice of just ssl my roadrunner email will work just fine.

This is what senders see when they try to send me an email Subject: Mail System Error - Returned Mail with Subject: Test From: Mail Administrator <Postmaster@msg.pkvw.co.charter.net> Date: 4/7/2026, 10:36 AM To: ksmith29@carolina.rr.com This Message was undeliverable due to the following reason: Each of the following recipients was rejected by a remote mail server. The reasons given by the server are included to help you determine why each recipient was rejected. Recipient: <Ksmith29@carolina.rr.comh> Reason: 5.1.1 <ksmith29@carolina.rr.comh> Recipient address rejected: User does not exist. Please reply to <Postmaster@msg.pkvw.co.charter.net> if you feel this message to be in error. Reporting-MTA: dns; p-mtain018.msg.pkvw.co.charter.net Arrival-Date: Tue, 7 Apr 2026 14:36:37 +0000 Received-From-MTA: dns; p-impin025.msg.pkvw.co.charter.net (47.43.26.180) Original-Recipient: RFC822;<ksmith29@carolina.rr.com> Final-Recipient: RFC822; <ksmith29@carolina.rr.com> Action: failed Status: 5.1.1 Remote-MTA: dns; mail-twc-com.msg.pkvw.co.charter.net (47.43.26.4) Diagnostic-Code: smtp; 550 5.1.1 <ksmith29@carolina.rr.comh> Recipient address rejected: User does not exist. X-Actual-Recipient: RFC822; <Ksmith29@carolina.rr.comh> ForwardedMessage.eml Subject: Test From: Kevin Smith new <ksmith29@carolina.rr.com> Date: 4/6/2026, 4:43 PM To: ksmith29@carolina.rr.com Attachments: ForwardedMessage.eml 2.7 KB

Notice the h it puts in after my rr email address Thank you, Kevin

Currently all the function buttons - delete, move, mark unread etc - are positioned at the top of the Android UI. This makes it necessary to use 2 hands to check emails, which not everyone is able to do. For the rest of us it slows down work flow substantially which is infuriating. Is there any way to move these buttons to the bottom or side of the screen? If not, please add this capability ASAP. I will have to revert to Fairmail until it's fixed.

Any chance in a standalone Thunderbird calendar application to be put into works and have the possibility to be made for Android now that Thunderbird is available on Android as well, as I think it would be really great if I could have the benefits of both the Thunderbird email client and Thunderbird Calendar at the same time which would rival against other apps like Proton Calendar and Tuta Calendar.

It could then be featured on places like:

https://www.privacyguides.org/en/calendar/

https://privacypack.org/

Which would then hopefully increase the amount of people that use Thunderbird products.

Thanks for all the hard work the dev team has done for the Thunderbird email client for Android as i am really grateful for it as I use it as a gmail replacement until Thunderbird Pro is available to get a Thundermail email address, but I noticed a gap in the market for a standalone Thunderbird calendar app for Android and I think it would be a massive missed opportunity!

Buongiorno ho cambiato la password della mail certificata ma non riesco a modificarla anche sullo smartphone sul quale gestisco la posta tramite l'app tunderbird .come devoprocedere?

Buongiorno ho cambiato la password della mail certificata ma non riesco a modificarla anche sullo smartphone sul quale gestisco la posta tramite l'app tunderbird .come devoprocedere?

The qr code is correctly scanned by Google photo. It is the Thunderbird android app than simply do nothing apart activating camera video of phone. I try to make smaller or brighter the qr code on the desktop, nothing Import ally emails account is a nightmare.

Btw Thunderbird is the only app that was not automatically configured on my new phone.

I want to use POP3 (limited Serverspace). When the mails are deleted on the server and stored on the phone, i would like to backup the mailbox. Where does Thunderbird for Android save POP3 Mailboxes? OR Is there a Backup-Restore Feature for POP3 Mailboxes? Thaks a lot!