Hi, do you mean a) happens to some messages, b) happens to some other? Because I don't think they can happen at the same time.

Can you try these steps:

1. find your popstate.dat (https://kb.mozillazine.org/Popstate.dat) 2. find the UIDL of a problematic message 3. delete that UIDL line from popstate.dat 4. Get Messages again

Anything different for that message?

Thank you Ping Chen.

Only some messages are empty. It seems to happen randomly. However, if I delete a message using Thunderbird and then "undo" the deletion, the message body is blank. This is consistent. Then God forbid I looked in my Trash folder and found that some messages which were NOT empty are now empty, and that some messages seem to have coding in them like a raw print file instead of the user recognizable things. On the subject of Thunderbird 102 I really do not think they tested it properly.

For your solution I first deleted the popstate.dat file and so the retrieved all my messages a second time. The second set of messages came through OK with all their info. Thanks again, Delano Attride

Ping Chen, By the way could this thing be caused by a password or initialization issue? I noticed that I can retrieve valid messages the first time I load the program and sign in but after I am already signed in and try to retrieve the same message, the message body disappears. Delano Attride

I have the same or similar problem, also starting with the update to 102, and it also might be related to accessing emails from my iPad.

My email account uses an IMAP server, and I access it from two devices - one a PC, the other an iPad. I notice the issue on my PC, not my iPad. The symptoms are exactly that (on my PC) Thunderbird displays the message headers, but does not display the message body. This occurs on a few emails, but not all emails. Today, I noticed that the missing body text emails exactly correspond with emails I had previously accessed, read, and - in some cases - replied to on my iPad (I had not previously accessed those specific emails on my PC).

I noticed this on another (POP3) account a few days ago, and all I did was restart Thunderbird, which basically effected disconnecting and reconnecting with the mail server. After doing so, everything was fine - message headers and body intact. Today, when I tried doing that on the IMAP mail server, it didn't work, so now I am missing the body text and attachments from about ten emails.

Any suggestions?

Thanks.

Replying to 3D4Play. Very, very Interesting. I am using macOS with Big Sur. I too have an iPad and most times read my mail first on the iPad and then on my MAC. Although I am using Thunderbird 102.0.2 my email messages still disappear (See my later posts). I will check out the iPad issue tomorrow when I get more emails. By the way I have my account setting on Thunderbird to retrieve headers first but Thunderbird ignores this instruction and retrieves the entire message. Do you have a similar problem? Delano Attride

IMAP, not POP3, so no option needed to download one or the other, right?

BTW, I am also using 102.0.2, on PC

Replying to 3D4Play. My iPad also uses imap, so we are the same except that my desktop is an iMac. Anyhow, on my iPad this morning, I read some messages, deleted some messages and forwarded a message to myself. Then I went to the iMac and was able to retrieve them all using Thunderbird. Based on my experience I have found that Thunderbird retrieves all my messages when I first load it and sign in. I then close it until I am ready to read new mail at which time I will load it again and sign in. I also notice that Thunderbird drops most messages that just reach the server. Just recently I was on the phone and the person I was talking to said they just sent me a message. Since I had Thunderbird open and had signed in I switched over to it to retrieve the message and found that Thunderbird had dropped it, i.e. the message content is all blank but the header is OK. I was able to login to the mail server directly, and forward the message to myself. I then reloaded Thunderbird afresh and was able to retrieve the message I had forwarded to myself. So from then on I always load Thunderbird, sign in, retrieve my messages and close Thunderbird. To retrieve all messages on the server you can also delete the POPSTATE.DAT file as Ping Chen had said earlier, but I don't do that anymore. Delano Attride

It sounds like we both have the same or similar issues, and it sounds like you have found a workaround, but is this something that the Thunderbird developers should be fixing?

Replying to 3D4Play. We just wait for the next version and hope that whatever problems we have are corrected. Sometimes what seems simple to people turns out to be very complicated to developers/programmers. And remember that Thunderbird and Firefox are supposedly worked on by "volunteers". Just today I think it changed one of my settings with the result that all my messages were in source format. I complained and changed it back but things like that can happen, although this is a first. I also think that they might just have released this latest version too soon but that's the way things work. As a fall back for emails I have my iPad, and the email servers themselves. Plus I have the work around Ping Chen sent. I can always get my messages. Worse come to worse I will switch to MAIL from Apple. That's free too and it works. But I have been using Firefox and Thunderbird for a very long long time and it's hard to switch. Delano Attride