From 2f22267a777d2c7e2c222cb918a05587a325b335 Mon Sep 17 00:00:00 2001
From: the-djmaze <>
Date: Fri, 10 Feb 2023 11:06:12 +0100
Subject: [PATCH] Resolve #836

---
 .../v/0.0.0/app/libraries/MailSo/Imap/ImapClient.php       | 1 +
 .../v/0.0.0/app/libraries/MailSo/Imap/SearchCriterias.php  | 7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/ImapClient.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/ImapClient.php
index b9317b9cd..f4a1ac8ec 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/ImapClient.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/ImapClient.php
@@ -617,6 +617,7 @@ class ImapClient extends \MailSo\Net\NetClient
 		}
 /*
 		// literal-string
+		$this->hasCapability('LITERAL+')
 		if (\preg_match('/[\r\n\x00\x80-\xFF]/', $sStringForEscape)) {
 			return \sprintf("{%d}\r\n%s", \strlen($sStringForEscape), $sStringForEscape);
 		}
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/SearchCriterias.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/SearchCriterias.php
index 427345333..5a04f718e 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/SearchCriterias.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/SearchCriterias.php
@@ -316,8 +316,11 @@ abstract class SearchCriterias
 
 	public static function escapeSearchString(\MailSo\Imap\ImapClient $oImapClient, string $sSearch) : string
 	{
-		return !\MailSo\Base\Utils::IsAscii($sSearch)
-			? '{'.\strlen($sSearch).'}'."\r\n".$sSearch : $oImapClient->EscapeString($sSearch);
+//		return $oImapClient->EscapeString($sSearch);
+//		return \MailSo\Base\Utils::IsAscii($sSearch) || $oImapClient->hasCapability('QQMail'))
+		return (\MailSo\Base\Utils::IsAscii($sSearch) || !$oImapClient->hasCapability('LITERAL+'))
+			? $oImapClient->EscapeString($sSearch)
+			: '{'.\strlen($sSearch).'}'."\r\n{$sSearch}";
 	}
 
 	private static function parseSearchDate(string $sDate) : int