Thunderbird Community Forum

Today is June 22nd 2026 , I was busy all weekend and I just checked my mail this morning , I noticed that the last email I got was Thursday June 18th 2026 , so I right clicked and clicked on "Get Messages" , suddenly I have about 40 emails , dating from the 19th to today , I have complained before about having issues with emails being a day or so late and was told that is when they were sent .... I am calling BS on that response and repeating my claim that something is WRONG with Thunderbird and how (or IF) it recieves emails , because there is no way that ALL the emails I normally get all decided at once to wait to send them to me till today (and I only got them because I clicked on Get Messages , otherwise I most likely still wouldn't have recieved any emails for several days from the date they were supposed to show up)

I can't be the only one with this issue , so hopefully someone has looked into this and come up with a actual FIX , , I have had this email program since Windows stopped Windows 10 Mail and honestly , since its been out for years prior to that , I would think it wouldn't still be buggy as it is , there are lots of features that are just combersome to use (like mass deleting emails by Name) all the way to just actually getting emails on time when they were actually sent (I have literally been on the phone with someone and they send me a email , and I don't get it for hours or sometimes days or sometimes not at all , and they are from people I have recieved emails from before and are part of my address book , so I should get them within minutes at most , not days or never ...

I am about ready to go find something else that is relaiable (and looks better , as I can't even add one of my pictures as a Background , and Light/Dark mode sucks as far as looks goes unless you are some GOTH person or something) and actually user friendly (when I swtiched to this email program it was better than most of the others offered at the time , but honestly , it has never improved and has remained unfinished as far as I am concerned) , it says it "updates" all the time , but I have not noticed ANY improvements in Functionality or looks since I first downloaded it , and for as long as Thunderbird has been available , it should not still be in Beta form and actually function at least as well as Microsoft's outdated emails programs did , but as of this ongoing issue , it is still slow and clunky , it may or may not send you emails depending on the day , and is a pain to navigate things that should be easily accessible on the main page with a simple click , again I'm comparing it to Outlook Express which has been obsolete for years , and Windows 10 Mail because as old as they are , they functioned much better than this email ever has and look much better , at least they allowed personal pictures for a Background

If you don't have a actual FIX for this ongoing issue , then I think it's time for me to move on and find something that actually functions like a email program should , by actually being able to recieve emails faster than Pony Express , which was last used because it was too slow over 165 years ago

If you DO have a FIX for this ongoing issue of not recieving emails when they were actually sent (I complained about this exact issue back in January) , not days later , or being able to close Thunderbird and still get emails alerts (you know like Microsoft has for years , and as much as I dislike Microsoft and their policies and FORCED Feature Windows Updates that screw up everything , at least they had a decent and functional email program since Windows 95 through Windows 10 Mail , but all they offer now is Outlook and I don't do online emails , I want it on my Desktop , which is why I went to Thunderbird in the first place) , maybe since they discontinued theirs , you could just copy/paste everything from it and call it Thunderbird

At least then it would work like it should , and look better , and actually not have to just minimize it in the taskbar so you will know at some point that you got a email , or to make it automatically start when Windows does , so I don't have to manually open it every time I restart my PC , since I have yet to find a setting for that , or if it is there its most likely hidden behind 40 other things you need to open to get to it , even though most likely the email alert sound never happens , maybe 2 times a month if I'm lucky , and even if it is several days late , (like I said 40 different people/companies didn't suddenly decide to wait 3 or more days to all send their emails at once , and only after I clicked Get Messages , oh , by the way , they are EMAILS NOT MESSAGES , a Message is a Text or Chat , a Email is a Email , maybe that is the issue , it doesn't know what its looking for)

As mentioned this has been a ongoing issue that I have complained about before , with no solution , and that no one here seems to want to address or actually FIX or even let me know they are working on a solution (which it seems like no one is) , so I'm tired of complaining to deaf ears , Helen Keller would have figured out what is wrong by now and she is Deaf , Blind and Dead ... When I am expecting a email from a Doctor that has info on a test or something , I need it when they send it , not days later or never .... I keep missing important emails because this program is and has been iffy at best since I have had it ...

I understand that the majority of the Staff for Thunderbird is Volunteers , but it just seems like no one cares what users experience and just brush it off and forget about it , and that is the issue I am and have been feeling with Support .... Not trying to be a jerk , I'm just frustrated with the lack of concern with how this program has and still does function

Thanks ..... Jim

> I have 6 email accounts I manage in my Thunderbird. > Normally I do not delay sending emails, so I have not had a reason to use the Unsent Messages Folder. > I recently installed Thunderbird's Mail Merge Add-On to send mass individual emails to classmates for a school reunion. Doing it this way will allow me to track individual bad emails. I have a total of 3621 emails. > I created a new Gmail Account for this purpose. > There is a concern to not send too many emails out at once to avoid getting flagged and suspended by Gmail as a Spam Account. (Limits of 50 to 500 per 24 hr period have been suggested to avoid this), so scheduling bursts of emails over a period of time is necessary. > The Mail Merge Add-On has 3 output choices, Save as Drafts, Send Later, Send Now. (The instructions warn against using Send Now) > I tried the Save as Drafts function and it performed as promised, creating 3621 individual customized emails in my Account's Draft folder. This, however, makes it so you have to send each email individually. > When I tried the Send Later function, it appeared to work, but a Local Folders > Unsent Messages folder never appeared. I searched all my other email accounts and finally found it in the one Old Defunct email account list that I never use anymore. It does appear to have created all 3621 emails. > I tried to Drag & Drop it into the Local Folders stack, but received an error message that a folder of that name already exists there, even though it does not appear in the list of folders. > I tried repairing folders, compressing folders and was not able to move it or even create a new one of that name and copy the contents. > I would like advice on how to proceed to complete moving/copying the Unsent Messages folder to its proper location in the Local Folders stack. Thank you! greg

For a few days, MOST of my sent emails are not going to their destination but ending up in the TRASH folder. If I keep resending, it might finally go through. I've looked up solutions but still unsure what's going on.

I have 2 accounts one is thru Outlook.com and one is from my cable provider. When a message comes in from my cable provider if the subject meets one of the filter entries it should mov it to the folder in Outlook via the account I have setup in thunderbird. Sometimes this takes place and it worked like it was supposed to and others it doesn't I find all of the message that should have been forwarded still in the inox of the other account. When I look at the filter log it shows that the move was completed. Its kind of funny because the folder in theoutlook account turns blue like it is holding a new message but when you click on it the message is not there.

Thanks Rick

I have successfully set up 3 email accounts using my default domain. When I try to use an email account that uses a second domain I can't send or receive emails. This account required manual setup which I did but it does not work. My web hosting is with Namecheap and I do believe settings at that end are correct. Any help would be appreciated.

E-Mail messages are in Xfinity, but do not come to Mozilla Thunderbird. Not having access to Mozilla email, prevents messages to be sent from Xfinity. I also cannot send messages from web sites. brucelowrey@comcast.net

Returned from a 1-month trip and my Windows11 would load - repair didn't fix it, so I had to reload Windows.

Now I'm unable to right-click on a photo and send it via my Thunderbird email. When I right-click on 'Send to', there's no email option showing.

Thanks in advance,

Scott

I have a request.

Please make it easier to send feedback to the developers.

I don’t want to have to log in to the forum every time just to ask someone who might not even be an expert.

I’m Japanese and don’t speak English, so the English forum is difficult for me to use.

It’s a hassle to have to post on the forum like this just because I can’t easily send feedback in my local language.

I have two pieces of feedback I wanted to share this time.

1. Sometimes when I open Thunderbird, I get an error message saying it can’t load because there are too many accounts. Is this because it’s trying to check them all at once?

Please have it load them one by one in order. Or, please add an option in the settings to do this.

2. Messages marked with “Re:” are replies, right?

Let’s say my account is “Apple.” If I reply from “Apple,” a message marked “Re:” should remain in the “Apple” folder. From the recipient’s perspective, replies to emails from “Apple” should also come from “Apple.”

However, there were emails where I was recorded as having replied from a different account, even though I don’t recall switching accounts when replying.

So, from the recipient’s perspective, it looked like the email came from a stranger, and they replied asking me to identify myself.

While it’s not impossible that I might have changed the address by mistake while half-asleep, I’m reporting that there were instances where I was recorded as replying from a different address even though I don’t remember making a mistake.

I just want to share a request and a report, so there’s no need to reply.

Translated with DeepL.com (free version)

要望です。

開発者にフィードバックを簡単に送れるようにしてください。

いちいちフォーラムへログインして、素人かもしれない人に訊きたい訳ではありません。

私は日本人で英語が出来ませんので、英語のフォーラムも使いにくいです。

簡単にローカル言語でフィードバックが送れないから、こうしてフォーラムで投稿しないといけないのは手間です。

今回送りたかったフィードバックは二つです。

1、サンダーバードを開くと、アカウントが多いからロード出来ないとかエラーメッセージが出てくることが時々ありますが、一度に確認しようとするからでしょう？

一つずつ順番に読み込むようにしてください。 もしくは、設定で、そのように出来るようにしてください。

2、Reが付いているものは、返信したものでしょう？

アカウントがリンゴだとします。 リンゴから返信したら、リンゴの中にRe付きのものが残るはずです。 相手からしたら、リンゴから来たメールの返信もリンゴから来るはずです。

しかし、返信する時にアカウントを変えた覚えがないのに、違うアカウントから返信したことになったメールがありました。

なので、相手からしたら、知らない人からメールが来たことになり、誰だか分からないから教えてくださいと返信が来ました。

ねぼけて返信時にアドレスを変更した可能性も0ではありませんが、間違えた覚えが無いのに違うアドレスから返信したことになったものがあったことを報告しておきます。

リクエストと報告を伝えたいだけなので、返信は不要です。

Hi David This is the last attempt I did but it failed. Enclosed is the screen shot you have asked for. Keep in mind my WIN 10 has 64 Bit but the last update from Thunderbird was 32 Bit

Heinz

Hi Below is the message I get when I try to send an email from my new computer

Sending of the message failed. An error occurred while sending mail. The mail server responded: <mary@maryodonnellaccounts.ie>: Sender address rejected: not logged in. Please verify that your email address is correct in your account settings and try

Thank you Mary

Thunderbird Send message Error Sending of the message failed An error occurred while sending mail. The mail server responded: Must issue a STARTTLS command first. For more info, go to https://support.google.com/a/answer/3221692 and review RFC 3207 specifications. ffacd0b85a97d-47aa0f2186bsm33992962f8f.36 -gsmtp. Please verify that your email address is correct in your account settings and try again.

Note: I could not find the suggested specifications as indicated in the error message!

I did not change anything, the sending error occurred suddenly , all my settings IMAP Mail Server Port 993 SSL/TLS OAuth2 and SMTP Port 465 are still set to default. I changed also the SMTP to an new shown default 587 but non of this settings resolved the problem

When email downloads from my internet server to thunderbird how do I indicate that the message is to be deleted from the server. ie I dont want the message to be in two places . At the moment after reading the email and saving it to a folder I have to log into my internet provider and delete the email.

Locked out of my emails since Feb 26 2026: [redacted] @hotmail.com [redacted] @hotmail.com [redacted] @hotmail.com

/edited email from public community support forum.

Assistance with Read Receipt and Delivery Status Notification

Good afternoon,

Thank you for taking the time to read my email.

I have been trying to determine why I do not receive read receipts after selecting Return Receipt and Delivery Status Notification under the Options tab when sending emails. This has been an ongoing issue for more than 10 years.

I am currently using Thunderbird version 152.0 on one computer and 140.10.2 ESR (32-bit) on another. Despite trying numerous settings and troubleshooting steps over the years, I have never been able to receive a read receipt.

I would be truly grateful if you could guide me in the right direction or let me know if there is a setting I may have overlooked. If there are any troubleshooting steps or additional information you need from me, I would be happy to provide it.

Thank you very much for your time and assistance. I sincerely appreciate your help.

Kind regards,

Brenda