2. If you are satisfied with your current job, directly reply to the other party that you have arrived at a new company and have the opportunity to cooperate again in the future.
3. If the previous delivery company has always been your favorite company, you can get to know the situation first, or even contact. After all, just giving you a reply (inviting an interview, right) doesn't mean you are hired. Feel good after the interview, and then compare your choice with your current company.