diff --git a/application/Espo/Controllers/InboundEmail.php b/application/Espo/Controllers/InboundEmail.php
index 4bd09301a1..af25502b78 100644
--- a/application/Espo/Controllers/InboundEmail.php
+++ b/application/Espo/Controllers/InboundEmail.php
@@ -35,6 +35,7 @@ use Espo\Core\Mail\Account\Storage\Params as StorageParams;
 
 use Espo\Core\Controllers\Record;
 use Espo\Core\Api\Request;
+use Espo\Core\Mail\Exceptions\ImapError;
 
 class InboundEmail extends Record
 {
@@ -45,7 +46,8 @@ class InboundEmail extends Record
 
     /**
      * @return string[]
-     * @throws \Espo\Core\Exceptions\Error
+     * @throws Error
+     * @throws ImapError
      */
     public function postActionGetFolders(Request $request): array
     {
diff --git a/application/Espo/Core/Mail/Account/Fetcher.php b/application/Espo/Core/Mail/Account/Fetcher.php
index 8aa8edcaa6..7baa58084d 100644
--- a/application/Espo/Core/Mail/Account/Fetcher.php
+++ b/application/Espo/Core/Mail/Account/Fetcher.php
@@ -32,6 +32,8 @@ namespace Espo\Core\Mail\Account;
 use Espo\Core\Exceptions\Error;
 
 use Espo\Core\Mail\Account\Storage\Flag;
+use Espo\Core\Mail\Exceptions\ImapError;
+use Espo\Core\Mail\Exceptions\NoImap;
 use Espo\Core\Mail\Importer;
 use Espo\Core\Mail\Importer\Data as ImporterData;
 use Espo\Core\Mail\ParserFactory;
@@ -69,6 +71,8 @@ class Fetcher
 
     /**
      * @throws Error
+     * @throws ImapError
+     * @throws NoImap
      */
     public function fetch(Account $account): void
     {
diff --git a/application/Espo/Core/Mail/Account/GroupAccount/Service.php b/application/Espo/Core/Mail/Account/GroupAccount/Service.php
index 1fba7c1556..4bbe4d048b 100644
--- a/application/Espo/Core/Mail/Account/GroupAccount/Service.php
+++ b/application/Espo/Core/Mail/Account/GroupAccount/Service.php
@@ -36,6 +36,8 @@ use Espo\Core\Mail\Account\Fetcher;
 use Espo\Core\Mail\Account\Storage\Params;
 use Espo\Core\Mail\Account\StorageFactory;
 
+use Espo\Core\Mail\Exceptions\ImapError;
+use Espo\Core\Mail\Exceptions\NoImap;
 use Espo\Core\Utils\Log;
 use Exception;
 use Laminas\Mail\Exception\ExceptionInterface;
@@ -53,6 +55,8 @@ class Service
     /**
      * @param string $id Account ID.
      * @throws Error
+     * @throws ImapError
+     * @throws NoImap
      */
     public function fetch(string $id): void
     {
@@ -64,6 +68,7 @@ class Service
     /**
      * @return string[]
      * @throws Error
+     * @throws ImapError
      */
     public function getFolderList(Params $params): array
     {
@@ -103,7 +108,7 @@ class Service
                 'message' => $e->getMessage(),
             ]);
 
-            $message = $e instanceof ExceptionInterface ?
+            $message = $e instanceof ExceptionInterface || $e instanceof ImapError ?
                 $e->getMessage() : '';
 
             throw new ErrorSilent($message);
@@ -126,6 +131,8 @@ class Service
     /**
      * @param string $id Account ID.
      * @throws Error
+     * @throws ImapError
+     * @throws NoImap
      */
     public function storeSentMessage(string $id, Message $message): void
     {
diff --git a/application/Espo/Core/Mail/Account/GroupAccount/StorageFactory.php b/application/Espo/Core/Mail/Account/GroupAccount/StorageFactory.php
index 2e82983b96..8dc9787f8b 100644
--- a/application/Espo/Core/Mail/Account/GroupAccount/StorageFactory.php
+++ b/application/Espo/Core/Mail/Account/GroupAccount/StorageFactory.php
@@ -33,11 +33,16 @@ use Espo\Core\Mail\Account\Storage\Params;
 use Espo\Core\Mail\Account\Account;
 use Espo\Core\Mail\Account\StorageFactory as StorageFactoryInterface;
 use Espo\Core\Mail\Account\Storage\LaminasStorage;
+use Espo\Core\Mail\Exceptions\ImapError;
 use Espo\Core\Mail\Exceptions\NoImap;
 use Espo\Core\Mail\Mail\Storage\Imap;
 use Espo\Core\Utils\Log;
 use Espo\Core\InjectableFactory;
 
+use Laminas\Mail\Storage\Exception\RuntimeException;
+use Laminas\Mail\Storage\Exception\InvalidArgumentException;
+use Laminas\Mail\Protocol\Exception\RuntimeException as ProtocolRuntimeException;
+
 use Throwable;
 
 class StorageFactory implements StorageFactoryInterface
@@ -47,9 +52,6 @@ class StorageFactory implements StorageFactoryInterface
         private InjectableFactory $injectableFactory
     ) {}
 
-    /**
-     * @throws NoImap
-     */
     public function create(Account $account): LaminasStorage
     {
         $imapParams = $account->getImapParams();
@@ -122,6 +124,13 @@ class StorageFactory implements StorageFactoryInterface
             }
         }
 
-        return new LaminasStorage(new Imap($imapParams));
+        try {
+            $storage = new Imap($imapParams);
+        }
+        catch (RuntimeException|InvalidArgumentException|ProtocolRuntimeException $e) {
+            throw new ImapError($e->getMessage(), 0, $e);
+        }
+
+        return new LaminasStorage($storage);
     }
 }
diff --git a/application/Espo/Core/Mail/Account/PersonalAccount/Service.php b/application/Espo/Core/Mail/Account/PersonalAccount/Service.php
index 67e0db9ef1..b7514825c2 100644
--- a/application/Espo/Core/Mail/Account/PersonalAccount/Service.php
+++ b/application/Espo/Core/Mail/Account/PersonalAccount/Service.php
@@ -30,6 +30,8 @@
 namespace Espo\Core\Mail\Account\PersonalAccount;
 
 use Espo\Core\Exceptions\ErrorSilent;
+use Espo\Core\Mail\Exceptions\ImapError;
+use Espo\Core\Mail\Exceptions\NoImap;
 use Espo\Core\Utils\Log;
 use Exception;
 use Laminas\Mail\Exception\ExceptionInterface;
@@ -56,6 +58,9 @@ class Service
     /**
      * @param string $id Account ID.
      * @throws Error
+     * @throws NoImap
+     * @throws ImapError
+     *
      */
     public function fetch(string $id): void
     {
@@ -68,6 +73,7 @@ class Service
      * @return string[]
      * @throws Forbidden
      * @throws Error
+     * @throws ImapError
      */
     public function getFolderList(Params $params): array
     {
@@ -162,6 +168,8 @@ class Service
     /**
      * @param string $id Account ID.
      * @throws Error
+     * @throws ImapError
+     * @throws NoImap
      */
     public function storeSentMessage(string $id, Message $message): void
     {
diff --git a/application/Espo/Core/Mail/Account/PersonalAccount/StorageFactory.php b/application/Espo/Core/Mail/Account/PersonalAccount/StorageFactory.php
index 75db08292b..232cb36f0f 100644
--- a/application/Espo/Core/Mail/Account/PersonalAccount/StorageFactory.php
+++ b/application/Espo/Core/Mail/Account/PersonalAccount/StorageFactory.php
@@ -32,6 +32,7 @@ namespace Espo\Core\Mail\Account\PersonalAccount;
 use Espo\Core\Mail\Account\Storage\Params;
 use Espo\Core\Mail\Account\StorageFactory as StorageFactoryInterface;
 use Espo\Core\Mail\Account\Account;
+use Espo\Core\Mail\Exceptions\ImapError;
 use Espo\Core\Mail\Exceptions\NoImap;
 use Espo\Core\Mail\Mail\Storage\Imap;
 use Espo\Core\Mail\Account\Storage\LaminasStorage;
@@ -41,6 +42,9 @@ use Espo\Entities\UserData;
 use Espo\Repositories\UserData as UserDataRepository;
 use Espo\ORM\EntityManager;
 
+use Laminas\Mail\Protocol\Exception\RuntimeException as ProtocolRuntimeException;
+use Laminas\Mail\Storage\Exception\InvalidArgumentException;
+use Laminas\Mail\Storage\Exception\RuntimeException;
 use LogicException;
 use Throwable;
 
@@ -52,9 +56,6 @@ class StorageFactory implements StorageFactoryInterface
         private EntityManager $entityManager
     ) {}
 
-    /**
-     * @throws NoImap
-     */
     public function create(Account $account): LaminasStorage
     {
         $userLink = $account->getUser();
@@ -172,9 +173,14 @@ class StorageFactory implements StorageFactoryInterface
             }
         }
 
-        return new LaminasStorage(
-            new Imap($imapParams)
-        );
+        try {
+            $storage = new Imap($imapParams);
+        }
+        catch (RuntimeException|InvalidArgumentException|ProtocolRuntimeException $e) {
+            throw new ImapError($e->getMessage(), 0, $e);
+        }
+
+        return new LaminasStorage($storage);
     }
 
     private function getUserDataRepository(): UserDataRepository
diff --git a/application/Espo/Core/Mail/Account/StorageFactory.php b/application/Espo/Core/Mail/Account/StorageFactory.php
index 9dea801309..78941b2a2f 100644
--- a/application/Espo/Core/Mail/Account/StorageFactory.php
+++ b/application/Espo/Core/Mail/Account/StorageFactory.php
@@ -30,10 +30,23 @@
 namespace Espo\Core\Mail\Account;
 
 use Espo\Core\Mail\Account\Storage\Params;
+use Espo\Core\Mail\Exceptions\ImapError;
+use Espo\Core\Mail\Exceptions\NoImap;
 
 interface StorageFactory
 {
+    /**
+     * Create an account.
+     *
+     * @throws NoImap
+     * @throws ImapError
+     */
     public function create(Account $account): Storage;
 
+    /**
+     * Create an account with parameters.
+     *
+     * @throws ImapError
+     */
     public function createWithParams(Params $params): Storage;
 }
diff --git a/application/Espo/Core/Mail/Exceptions/ImapError.php b/application/Espo/Core/Mail/Exceptions/ImapError.php
new file mode 100644
index 0000000000..29e16cca32
--- /dev/null
+++ b/application/Espo/Core/Mail/Exceptions/ImapError.php
@@ -0,0 +1,32 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2024 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Mail\Exceptions;
+
+class ImapError extends \Exception {}