Email bounces in German.

Our client (a sort of golf travel company) in the UK regularly sends out email worldwide to their clients. They are now receiving bounce-backs in German, making it difficult for my client to resolve them. The user sending the orginal emails is ccarugati@iagto.com

I have contacted  the ISP (Fasthosts in the UK) and they understandably say "This would only happen if the e-mail you are sending to is hosted on a German server as the bounce back is sent from the server rejecting the e-mail." however, our client receives these from all over the world always with the same formatting, so they seem to be coming from the same generating program, if not the same server?

I attach some of the bounce messages (they're in Outlook Item file format).

I suppose the other issue is what are these, or what's causing, the bounce-backs in the first place?

I am sure those of you who "enjoy" trawling through email bounce headers will find this a fun challenge :-)
Undeliverable-2018-IAGTO-Conventions.msg
Undeliverable-Time-to-Register-for-A.msg
Undeliverable-Time-to-Register-for-N.msg
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gerlisAsked:
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John TsioumprisSoftware & Systems EngineerCommented:
Have you checked if the e-mail is blacklisted in any of the BlackList Providers...
Start from MX ToolBox to get this piece of info
ste5anSenior DeveloperCommented:
Check the smtp chain. Otherwise it may be spam masked as bounces.
gerlisAuthor Commented:
Thanks

John Tsioumpris: Comes up all clear, not on any blacklists.
ste5an: Indeed we were also suspecting these weren't real bounces at all. How do I check the smtp chain? (this is running on Hosted Exchange)
gerlisAuthor Commented:
My client says: "I’m not sure that it’s spam because these emails come as a direct result of us sending emails to these recipients. We send an email broadcast from Felix [their database system] and get these replies from some of the recipients. However, those recipients do exist and some have got back in touch with Carlton [ccarugati@iagto.com] to say that they did not receive the email, but that their email address is correct.

Therefore perhaps the answer is that, en route to recipients all around the world, Carlton’s emails go thru a routing box in Germany that flags up ccarugati@iagto.com as blacklisted and sends out a message saying that the email is undelivered?

So it is definitely hampering our communications efforts as those emails are not getting thru to people that want to receive it."
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