S', Sa', Sabc' - was bedeuten diese Flags?

[Alexander Dalloz]

Am 06.01.2020 um 15:40 schrieb Peer Heinlein:
> On 06.01.20 15:26, Christoph P.U. Kukulies wrote:
>> Ich sehe in meinen /var/vmail/server.org/user/mail/Junk/cur
>>
>> files, die auf
>>
>>
>> 2,S'
>>
>> 2,Sa'
>>
>> 2,Sb'
>>
>> 2,Sabc'
>>
>> 2,Sac'
>>
>>
>>
>> enden. Was bedeuten diese Flags?
> 
> S ist \Seen,
> 
> das a/b/c scheinen mir userdefinierte Flags zu sein (es gibt eine
> separate Datei die dann festlegt, welcher Flag-Name das ist).
> 
> Peer

Ergänzend die Dovecot Wiki Doku dazu

https://wiki2.dovecot.org/MailboxFormat/Maildir

"Dovecot stores keywords in the maildir filename's flags field using 
letters a..z. This means that only 26 keywords are possible to store in 
the maildir. If more are used, they're still stored in Dovecot's index 
files. The mapping from single letters to keyword names is stored in 
dovecot-keywords file. The file is in format:

0 $Junk
1 $NonJunk

0 means letter 'a' in the maildir filename, 1 means 'b' and so on. The 
file doesn't need to be locked for reading, but when writing 
dovecot-uidlist file must be locked. The file must not be directly 
modified, it can only be replaced with rename() call.

For example, a file named

1234567890.M20046P2137.mailserver,S=4542,W=4642:2,Sb

would be flagged as $NonJunk with the above keywords."

Also mal in die dovecot-keywords in der jeweiligen Mailbox reinschauen 
für eine Übersetzung der Kleinbuchstaben nach dem S[een] Flag.

Alexannder