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Today a reader (Servus, Peter!) Asked me how it is that his mail program displays attachments like ATT0000x.html, although he only attached a .doc and a .docx file to the original mail on the Mac. Somehow the inserted attachments and a few others with the name ATT0000x.html appear to be displayed in the Windows mail program. The "x" in the file name stands for consecutive numbers starting with 1.
A short research revealed that the reason for these attachments is that the text part and the attachment part of the mail message were mixed by inserting attachments in the mail body between the texts. In particular, this seems to lead to the aforementioned ATT additional attachments if the sender uses Apple Mail and the recipient uses Microsoft Outlook or Exchange, for example.
However, the solution has not been that easy to find - although it is actually quite simple. In the Apple support forum there is a long thread, in which various solutions with various software such as Attachment Tamer, Mail Attachments Iconizer and the like are presented. Ultimately, you don't need any of this at all, because Apple Mail has everything on board that you need for a solution.
Fortunately, the solution to the matter is quite simple. There is an option in Apple Mail that does all of the work for this.
Go to the "Edit" menu in Apple Mail and then to the "Attachments" submenu. Here you activate the option "Always send attachments Windows-compatible".
Once that's done, Apple Mail will assemble the mails in the future in such a way that they do not lead to these strange attachments for Windows users.
I hope this solution helps you to get the attachments under control when sending the mails. Your Windows colleagues will thank you. : D
I got in touch again with the reader for whom I originally wrote the instructions. Despite a lot of trying things out, he didn't manage to keep the ATT attachments away and then went to a computer store that also knows about Macs. Although he couldn't do anything with the file attachments, he gave my reader a tip on how to get to the root of the problem and solve it: Use a different e-mail program. Then Peter has on his Mac Thunderbird Mail installed and now the mails arrive without the said ATT attachments. That's how it works, of course. ;-)
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Jens has been running the blog since 2012. He appears as Sir Apfelot for his readers and helps them with problems of a technical nature. In his free time he drives electric unicycles, takes photos (preferably with his iPhone, of course), climbs around in the Hessian mountains or hikes with the family. His articles deal with Apple products, news from the world of drones or solutions for current bugs.