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Fix threading view in Thunderbird (others?)

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Replies sent via SnappyMail break thread view in Thunderbird
due to not standard-compliant Reply-To and References headers.

* Due to the long IDs, the headers `Reply-To`, `References` (and `Messge-ID`)
  are split between the header name and its value. According to section RFC5322,
  section 2.2.3, this may be legal but it obviously causes problems.

* On subsequent replies, the parent's ID gets prepended to the `References`
  header. Section 3.6.4 of the same RFC specifies that the ID should be
  appended to that header.
This commit is contained in:
Torsten Kasch 2023-11-08 16:35:46 +01:00
parent 36789bd3b5
commit cdd74c8f20
2 changed files with 5 additions and 4 deletions
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5
snappymail/v/0.0.0/app/libraries/MailSo/Mime/Header.php
View file

@ -156,8 +156,9 @@ class Header
}
}
// https://www.rfc-editor.org/rfc/rfc2822#section-2.1.1
return \wordwrap($this->NameWithDelimitrom() . $sResult, 78, "\r\n ");
// https://www.rfc-editor.org/rfc/rfc2822#section-2.1.1, avoid folding immediately after the header name
return $this->NameWithDelimitrom() . \wordwrap($sResult, 78 - \strlen($this->NameWithDelimitrom()) - 1, "\r\n ");
}
public function IsSubject() : bool