When different emails may can have 1 attachements with the same name, then it might be an option to incorparate a mail seperation within the target folder path.
Like C:\Users\an…\Respond_Mails\XXX\attachment
XXX can be e.g the messageID from the email, Timestamp…
When one email may have multiple attachments with the same name, then there could be the option available to work on a mailmessage variable copy and modifying the attachment name e.g. along with a counter.
for sure both approaches can also be combined
let us know if further assistance is needed