Appending Outlook multiple attachment file names into a list in Python

I'm currently working on a script that reads unread emails in a folder and appends the file names of the attachments into a list for further data manipulation. The script works if there is only one attachment per email, but I am having trouble getting it to recognize when there are multiple attachments in an email (2+).

Here is the code I am working with so far:

outlook = win32com.client.Dispatch("Outlook.Application")
mapi = outlook.GetNamespace("MAPI")

inbox = mapi.Folders['user@outlook.com'].Folders['Inbox'].Folders['Folder1']
 
message = inbox.Items

contents = [] attachment_name = []

for mail in message:
    if mail.UnRead == True and mail.Attachments.Count > 0: # Grab all emails that are unread AND have an attachment
        attachments = mail.Attachments 
        m_attach = len([i for i in attachments])
        contents.append(mail.body)
        contents.append(mail.Subject)
        for i in range(1, m_attach):
            attachment = attachments.Item(i)
            attachment_name.append(attachment.FileName)

print(attachment_name)