emails wrongly marked as unread

[mikes2400]

I use Mozilla Firefox's Thunderbird as an email client for my Virgin Mail (Blueyonder) account. For some time now Thunderbird keeps marking my emails as Unread even after I've read them.

I use the Thunderbird setting "Automatically mark as read" but, although it does do that correctly when I click on a message in my Inbox, as soon as I archive the message it goes back to showing it in bold as 'Unread' in the Thunderbird Archive folder. This never used to happen.

I know this is essentially a Thunderbird - not a Virgin - problem, but I got no response on the Mozilla forum so hope someone here can make sense of it.

[用心棒]

Do you have any message filters defined for the account? To check this:

• select Tools > Message Filters
• select Filters for field and select the account where the issue is occurring
• disable any rules listed
• see if issue still occurs

Does the issue still occur?

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[mikes2400]

No, there are no message filters.

[philbilly]

I've been seeing the same. No message filters either.

[mikes2400]

Just to add to my original post, I've now noticed that Virgin Webmail is also marking these read emails as Unread, so maybe it IS a Virgin problem (although the Archive is a Thunderbird-created folder).

[用心棒]

I am using Thunderbird versions 102.6.0 (64-bit) and 109.0b3 (64-bit), and cannot reproduce the issue, i.e. select received email in Inbox until it is automatically marked read, archive and confirm it is still marked as read.

Which:

• operating system are you using and its version?
• Thunderbird version?

Are the email accounts affected using IMAP or POP3 in Thunderbird?

Does the issue occur when using a new Thunderbird profile? FYI: Either following the instruction here to manage Profiles  Using Multiple Profiles | Thunderbird Help or create a new user account for your operating systems.

[mikes2400]

I'm on Windows 10 Home (21H2) and the latest Thunderbird version, ie 102.6.1 (32-bit). The server setting is IMAP. I've only ever had one Thunderbird profile, and have been using that without problems for years.

[用心棒]

It would be helpful to see if the issue occurs under a new profile; it only needs to be used temporarily for testing.

[mikes2400]

I have just created one. How do I access that profile when i receive an email? I can't see it anywhere on my Thunderbird page.

[用心棒]

Read Starting the Profile Manager section in Using Multiple Profiles | Thunderbird Help