Email I sent being received multiple times by recipient

[#1]

A recipient of an email that I sent is complaining that the email keeps getting repeatedly delivered to them.

They think the problem is at my end as they don't have this issue with anyone else.

I am wondering if their receiving server is not sending an acknowledgement of the delivery and therefore the PN server keeps resending it.

Does anyone have any suggestions about this and how I might get it resolved?

Thx.

Bill.

[#2]

Hi Bill,

Could you ask for a copy of the headers of one of the duplicate emails they've received?

That might give away some clues into what's happening.

[#3]

Thanks, I'll try that.

Although I'm not sure they will be knowledgeable enough to do this, but I'll try and talk them through it.

[#4]

Cool. No problem, let me know how it goes. 

[#5]

@Gandalf 

Is there any possibility that Plusnet's sending email server is behaving in the same manner as the third-party server described here https://community.plus.net/t5/Email/Duplicate-email-Plusnet-MX-issue/m-p/1887347#M40737 ?

Certainly, sounds similar, albeit in this case its Plusnet doing the sending ... rather than Plusnet receiving multiple copies.

[#6]

Unfortunately had no further update from the recipient, so I can only assume that whatever the issue was, it has now gone away again 🙄.

Thanks for the support though, appreciated 😊.

Bill.