From a98b404551c14d083a9a0c1e184bc3684489a230 Mon Sep 17 00:00:00 2001
From: Francis Lachapelle <flachapelle@inverse.ca>
Date: Thu, 17 Feb 2022 10:09:37 -0500
Subject: [PATCH] fix(imap): use proxy authentication to detect IMAP delimiter

Fixes #5479
---
 SoObjects/SOGo/SOGoSieveManager.m | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/SoObjects/SOGo/SOGoSieveManager.m b/SoObjects/SOGo/SOGoSieveManager.m
index 2239e617d..01e5f2b68 100644
--- a/SoObjects/SOGo/SOGoSieveManager.m
+++ b/SoObjects/SOGo/SOGoSieveManager.m
@@ -897,17 +897,18 @@ static NSString *sieveScriptName = @"sogo";
   if (thePassword)
     {
       imapClient = [NGImap4Client clientWithURL: [theAccount imap4URL]];
-      [imapClient login: theUsername  password: thePassword];
+      [imapClient authenticate: [user login] authname: theUsername password: thePassword];
     }
   else
     imapClient = [[theAccount imap4Connection] client];
 
   delimiter = [imapClient delimiter];
 
-  if (!delimiter)
-    [imapClient list: @"INBOX"  pattern: @""];
-
-  delimiter = [imapClient delimiter];
+  if (!delimiter && [imapClient isConnected])
+    {
+      [imapClient list: @"INBOX"  pattern: @""];
+      delimiter = [imapClient delimiter];
+    }
 
   if (!delimiter)
     delimiter = [dd stringForKey: @"NGImap4ConnectionStringSeparator"];