[MlMt] read msg marking

[Sherif Soliman]

On 4 Aug 2016, at 19:23, Robert Brenstein wrote:

> The column "unread" in the list view shows a circle if the message is 
> unread or is empty. I see those circles in at least 3 colors: blue, 
> red, gray. However, I can't seem to find their explanation in the 
> manual.
>

Hi Robert,

The blue and grey are simple to explain:

- Blue: indicates a single unread message.
- Grey: You should only see grey next to a thread, not a single message. 
Grey means that the thread has a mix of unread and read messages. A 
thread that contains messages that are all unread should have blue next 
to it, and a thread of all read messages should have neither blue nor 
grey next to it.

The red one requires a more detailed explanation, and I will quote Bill 
Cole from this previous message on the list:

http://www.mail-archive.com/mailmate%40lists.freron.com/msg05861.html

On 18 Mar 2016, at 10:44, Bill Cole wrote:

> It means that you use another client in addition to MailMate with that 
> source account and that the other client handles message deletion in a 
> classical IMAP mode. This means that messages get marked with the 
> "\Deleted" flag when the user deletes them, but do not REALLY get 
> deleted until the mailbox or (if the server & client support the 
> UIDPLUS extension) the individual message is purged. Some servers 
> auto-purge mailboxes or individual \Deleted messages based on various 
> criteria and some clients do as well, although some client+server 
> combinations will never purge anything unless the user explicitly 
> commands it.
>
> So: a red dot in the "Read" column means that something other than 
> MailMate marked the message for deletion but has not yet told the 
> server to purge it.
>
> The mechanics of handling message deletion and presentation of 
> recoverable "deleted" messages vary broadly between IMAP clients. 
> MailMate uses a very conservative approach of not purging messages it 
> did not flag \Deleted, although I don't know how it manages that on 
> servers without UIDPLUS support (which was a requirement for early 
> versions of MailMate.)

Sherif
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