From 9c6a3f3c96cdf1d22fecf372a0f9f188d2d13d11 Mon Sep 17 00:00:00 2001
From: Christophe Chauvet <christophe.chauvet@gmail.com>
Date: Wed, 7 Jan 2026 17:52:47 +0100
Subject: [PATCH] fix(imap): issue when pattern is empty

Problem appear with some FTS backend

Ref #2336
---
 modoboa/webmail/lib/imaputils.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/modoboa/webmail/lib/imaputils.py b/modoboa/webmail/lib/imaputils.py
index cfc9adbd6..2284754ae 100644
--- a/modoboa/webmail/lib/imaputils.py
+++ b/modoboa/webmail/lib/imaputils.py
@@ -301,7 +301,10 @@ class IMAPconnector:
                 key = "SUBJECT"
             else:
                 continue
-            criterions = or_criterion(criterions, f'({key} "{pattern}")')
+            if pattern:
+                criterions = or_criterion(criterions, f'({key} "{pattern}")')
+            else:
+                criterions = "ALL"
         self.criterions = [bytearray(criterions, "utf8")]
 
     def messages_count(self, **kwargs) -> int: