MailListenerV2: fix exception in attachemnet parsing (demisto#36075)

* fix

* fix v2

* fix + RN

* ruff changes

* return the payload in case of error

* Update Packs/MailListener/ReleaseNotes/1_0_57.md

Co-authored-by: ShirleyDenkberg <62508050+ShirleyDenkberg@users.noreply.github.com>

* fix problem

* fix problem

* fix validation

* revert ruff change

* remove unused code + ignore ruff

---------

Co-authored-by: ShirleyDenkberg <62508050+ShirleyDenkberg@users.noreply.github.com>

Packs/MailListener/.pack-ignore

@@ -1,2 +1,5 @@
 [file:MailListenerV2.yml]
 ignore=IN126
+
+[file:README.md]
+ignore=RM106

Packs/MailListener/Integrations/MailListenerV2/MailListenerV2.py

@@ -52,7 +52,7 @@ def __init__(self, message_bytes: bytes, include_raw_body: bool, save_file: bool
         self.headers = email_object.headers
         self.raw_body = email_object.body if include_raw_body else None
         # According to the mailparser documentation the datetime object is in utc
-        self.date = email_object.date.replace(tzinfo=timezone.utc) if email_object.date else None
+        self.date = email_object.date.replace(tzinfo=timezone.utc) if email_object.date else None  # noqa: UP017
         self.raw_json = self.generate_raw_json()
         self.save_eml_file = save_file
         self.labels = self._generate_labels()
@@ -162,7 +162,11 @@ def parse_attachments(self) -> list:
         for attachment in self.attachments:
             payload = attachment.get('payload')
 
-            file_data = base64.b64decode(payload) if attachment.get('binary') else payload
+            try:
+                file_data = base64.b64decode(payload) if attachment.get('binary') else payload
+            except Exception as e:
+                file_data = payload
+                demisto.error(f'parse_attachments: Failed to decode the attachment data - {str(e)}')
 
             # save the attachment
             file_result = fileResult(attachment.get('filename'), file_data, attachment.get('mail_content_type'))
@@ -192,13 +196,13 @@ def convert_to_incident(self) -> dict[str, Any]:
         date = self.date
         if not date:
             demisto.info(f'Could not identify date for mail with ID {self.id}. Setting its date to be now.')
-            date = datetime.now(timezone.utc).isoformat()
+            date = datetime.now(timezone.utc).isoformat()  # noqa: UP017
         else:
             date = self.date.isoformat()
         return {
             'labels': self._generate_labels(),
             'occurred': date,
-            'created': datetime.now(timezone.utc).isoformat(),
+            'created': datetime.now(timezone.utc).isoformat(),  # noqa: UP017
             'details': self.text or self.html,
             'name': self.subject,
             'attachment': self.parse_attachments(),
@@ -520,7 +524,7 @@ def list_emails(client: IMAPClient,
                                       permitted_from_domains=permitted_from_domains,
                                       limit=_limit)
     results = [{'Subject': email.subject,
-                'Date': email.date.isoformat() if email.date else datetime.now(timezone.utc).isoformat(),
+                'Date': email.date.isoformat() if email.date else datetime.now(timezone.utc).isoformat(),  # noqa: UP017
                 'To': email.to,
                 'From': email.from_,
                 'ID': email.id} for email in mails_fetched]
@@ -544,13 +548,6 @@ def get_email_as_eml(client: IMAPClient, message_id: int) -> dict:
     return mail_file[0] if mail_file else {}
 
 
-def _convert_to_bytes(data) -> bytes:
-    demisto.debug("Converting data to bytes.")
-    bytes_data = bytes(data)
-    demisto.debug("Converted data successfully.")
-    return bytes_data
-
-
 def replace_spaces_in_credentials(credentials: str | None) -> str | None:
     """
     This function is used in case of credential from type: 9 is in the wrong format

Packs/MailListener/Integrations/MailListenerV2/MailListenerV2.yml

@@ -175,7 +175,7 @@ script:
       required: true
     description: Fetches an email by message ID and returns the information in an eml file format.
     name: mail-listener-get-email-as-eml
-  dockerimage: demisto/py3-tools:1.0.0.99035
+  dockerimage: demisto/py3-tools:1.0.0.108682
   isfetch: true
   runonce: false
   script: '-'

Packs/MailListener/ReleaseNotes/1_0_57.md

@@ -0,0 +1,7 @@
+
+#### Integrations
+
+##### Mail Listener v2
+
+- Fixed an issue where the ***fetch-incidents*** command failed when ingesting some emails.
+- Updated the Docker image to: *demisto/py3-tools:1.0.0.108682*.

Packs/MailListener/pack_metadata.json

@@ -2,7 +2,7 @@
     "name": "Mail Listener",
     "description": "Listen to a mailbox, enable incident triggering via e-mail",
     "support": "xsoar",
-    "currentVersion": "1.0.56",
+    "currentVersion": "1.0.57",
     "author": "Cortex XSOAR",
     "url": "https://www.paloaltonetworks.com/cortex",
     "email": "",