My Thunderbird (78.5.0) has developed a habit of losing emails with attachments in one of my accounts. The account is connected to O365 email via outlook.office365.com, p… (read more)
My Thunderbird (78.5.0) has developed a habit of losing emails with attachments in one of my accounts. The account is connected to O365 email via outlook.office365.com, port 993, using SSL/TLS and "normal password" authentication method. Win 10 Pro running on a Surface 2 Pro. I have 36+G free on the drive where Thunderbird resides. I have been using email clients from the now-Thunderbird lineage since Netscape Navigator Gold.
Here are the behaviors I'm seeing...
I will see an email with an attachment come in on my phone (Blackberry KeyTwo running Android, also pointed at outlook.office365.com). I will go to my laptop and it is not in my Inbox. I can go back to my phone, forward the email to any account (including the account with the problem) and the FORWARDED email will show up in my inbox. I can file the email using my phone to a folder int he same account, and it will show up in the folder. I can also wait some variable amount of time -- 3-5 hours seems about average, but it can be over a day -- and the email will finally show back up in my inbox.
If I am at my laptop and I see an email with an attachment come in, I will click on it in Thunderbird and the email will not load. I'll click on another email to make sure Thunderbird has not hung or something, and the email with the attachment will disappear. It will still be visible on my Blackberry.
If I close and restart Thunderbird, the "missing" emails appear in my Thunderbird inbox and are 100% accessible.
If I log into the Outlook web page, the emails are in there just like they are on my Blackberry. My login status to Outlook web app (logged in, logged out, running, not running) has no effect on the issue.
This behavior started about 3-4 weeks ago with 1-2 emails disappearing every week. Now it is several emails a day. It is only emails with attachments. It doesn't appear to have anything to do with the size of the attachment or what filetype the attachment is.
Anyone have any ideas? I'd surely apprecaite your thoughts.