Attachments as winmail.dat files in Mail app
I have seen similar questions posted before, but the thread was closed and none of the answers resolved the issue for me. I routinely have to send emails from my work email, which is a Microsoft 365 account, and send same through my office Outlook system. Whenever I send it to my personal gmail account, any attachment, whether a pdf, word or excel doc, the Mail application of my home Mac changes the attachment to a winmail.dat file. Yes, I am aware there is a converter available, but that would mean that each time I have to download and convert the file, which seems like a cumbersome and outdated solution. As others have pointed out, if I open the email directly through Gmail, the attachment is in the correct format, but what makes this strange is that when open the email through the Mail app of my iPhone, it also come through in the correct format - as a pdf, Word or Excel doc. Even more strange is that I tried sending it to my wife's personal email (also a gmail account), and when I open the email through the Mail app of her Mac, which is an older Mac than mine (hers is runing Big Sur 11.7.9), again the attachments are coming in correctly as a pdf, word or excel doc. As such, it seems to me its an issue with the Mail app on my Mac (which is a newer Mac running Tahoe 26.3.1(a)). Any assistance with resolving this issue would be greatly appreciated.
iMac 27″, macOS 26.3
