A mail with umlauts in subject is sent to 2 mailsystems.
in a mbox file it will be displayed as
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Subject: =?iso-8859-1?Q?WG:_=D6sterreich?=
and the same mail in scalix accessed via imap has
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Subject: =?x-scalix-?Q?WG:_=D6sterreich?=
and thunderbird cannot recognize that charset and display only one '?' in subject.
even worse, in SWA the mail will be rendered with the Subject
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=?x-scalix-?Q?WG:_=D6sterreich?=
(composed in SWA, OL or Thunderbird)
further, if a mail composed in thunderbird and sent to scalix with charset ISO-8859-15 instead of ISO-8859-1 all umlauts will be replaced with '*'
the body of all theses mails will be displayed correctly.
concerns old Scalix 9.2.0 - is this fixed on 10.0 ?