Hello, you mean you have 2 copies as a seller? anyway this is not connected with AliDropship plugin, you need to contact Mailgun supportI got the duplicated email using mailgun service. It happens many times. Please check it.
Please try to contact Mailgun support.Like this shipping copy email.
This happens only with Shipping notification. I don't think this relates to Mailgun. But I just submitted a ticket.Please try to contact Mailgun support.
I got response from Mailgun:
It looks like these messages were actually submitted twice from your application as the 2 accepted events we have in the logs have differing message IDs. The first message:
....
Please check your side to ensure that messages are not being submitted twice. If you have any new evidence to submit, please update the ticket and we can investigate further.