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Problem is, that mails get marked as read when I select them and they are shown in the preview pane.

I tried Thunderbird, Claws Mail and Sylpheed and I didn't find an option that prevents this. I'm open for new mail clients (but no console or KDE, please).

dAnjou
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  • ugh. it drives me nuts when they AREN'T automatically marked as read. I don't want another step to explicitly have to mark them when they have already appeared. – Michael Jan 17 '19 at 20:44

2 Answers2

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Most clients have settings that allow the user to modify this behavior. For example, in Thunderbird you can change these settings (under Edit | Preferences, then choose Advanced, and then the Reading and Display tab). If "Automatically mark messages as read" is checked, you can uncheck it and the automatic marking won't happen, which sounds like what you want.

If you keep it checked, you can control the automatic marking with the two radio buttons beneath that line, either to mark a message as read immediately upon viewing (even in the preview pane), or to have it marked as read if you view the message - even in the preview pane - for a particular length of time.

I know Evolution has a similar setting, and I assume most other mail clients do, too, but I'm not familiar with Claws Mail and with Sylpheed.

In Claws Mail, the settings controlling this behaviour are in the Preferences, Display / Summaries. The relevant options on this tab are the "Open message when selected" combo, and the "Mark message as read" settings.

Jorge Castro
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Kelley
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  • +1 on Claws - just did not see it. Even following instructions took me a while - selective blindness. Thanks! – Zayne S Halsall Jul 03 '14 at 08:25
  • In current Thunderbird versions (38.0.1 for me) I could not find this setting. You now have to edit it via the config editor (Tools->Options->Advanced->General tab->Config editor button on the lower right): set the key `mailnews.mark_message_read.auto` to `false`. – Chris Jul 16 '15 at 14:04
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In Sylpheed, under the Configuration Menu -> Common Preferences choose the Details tab (right-most one), then under the Interface sub-tab uncheck Always mark as read when a message is opened.

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Michael
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