Thunderbird always marks all my email as red (I turned off that option)
Thunderbird always marks all my email as red (I turned off that option) Changing option to mark as read after 600 seconds doesnt help either
Thunderbird always marks all my email as red (I turned off that option)
Changing option to mark as read after 600 seconds doesnt help either
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I assume you mean read, not the colour.
The usual cause of this is the mail already being downloaded to a phone or other device when the account type in Thunderbird is IMAP. Is this the case for you as well?