Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

All of my new emails are displaying as "read" in Thunderbird

  • 3 cavab
  • 1 has this problem
  • 1 view
  • Last reply by feldo172

more options

Very recently I began having an issue in Thunderbird where all new email downloaded from my mail server displays as previously read. This is an IMAP server/account. I access my email from several devices. I have made no changes to any of them or my email settings. The emails display as new/unread on all of my other devices: iPhone, iPad, and web access. Only when using Thunderbird do they show up as "previously read" (not bolded). I have double-checked my settings in Thunderbird; downloaded email is set to be marked as "read" after being displayed for 1 second. I have tried changing this to 2 seconds, 3 seconds, and "immediately" without any noticeable difference. I am running Thunderbird 64-bit v60.9.0 on a Mac desktop running Catalina v10.15.

Not the end of the world if I can't fix this; it's just annoying. Thank you in advance for any help.

Very recently I began having an issue in Thunderbird where all new email downloaded from my mail server displays as previously read. This is an IMAP server/account. I access my email from several devices. I have made no changes to any of them or my email settings. The emails display as new/unread on all of my other devices: iPhone, iPad, and web access. Only when using Thunderbird do they show up as "previously read" (not bolded). I have double-checked my settings in Thunderbird; downloaded email is set to be marked as "read" after being displayed for 1 second. I have tried changing this to 2 seconds, 3 seconds, and "immediately" without any noticeable difference. I am running Thunderbird 64-bit v60.9.0 on a Mac desktop running Catalina v10.15. Not the end of the world if I can't fix this; it's just annoying. Thank you in advance for any help.

Chosen solution

re : I am running Thunderbird 64-bit v60.9.0 on a Mac desktop running Catalina v10.15.

This is a known bug in version 60.9.0 Please update to current version and this issue should be resolved. The developers are not going to fix bugs in older versions. See bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1563948

Read this answer in context 👍 0

All Replies (3)

more options

One more piece for the puzzle:

When I receive new email, the Thunderbird dock icon displays the number of new, unread messages in a red circle.

The program itself, however, continues to display all email as unbolded/previously opened.

more options

Seçilmiş Həll

re : I am running Thunderbird 64-bit v60.9.0 on a Mac desktop running Catalina v10.15.

This is a known bug in version 60.9.0 Please update to current version and this issue should be resolved. The developers are not going to fix bugs in older versions. See bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1563948

more options

Thanks for the info on the update. I kept checking the "about Thunderbird" information menu which, even now, tells me that Thunderbird is "up to date." I thought an available update would have appeared there; my bad I guess. But the downloaded version update seems to have solved the issue. Thanks again.