📧 Outlook MSG file won't open on iPhone
iPhone has no built-in support for .msg files — it's a proprietary Microsoft Outlook format that iOS simply doesn't know how to open. Converting the .msg to a PDF is the fastest way to read it on any iPhone without installing extra apps.
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About .msg to PDF conversion
Why does my iPhone say it can't open the .msg file?
The .msg format is a proprietary container used by Microsoft Outlook on Windows and Mac. Apple never built a handler for it into iOS, so Mail, Files, and most iPhone apps have no idea what to do with it. Unlike .pdf or .docx, there is no native fallback — the system just gives up. You need to either convert the file or open it in a third-party app that specifically supports .msg.
How do I convert a .msg file to PDF so I can open it on my iPhone?
Upload your .msg file to OpenAny.io, select PDF as the output format, and download the result. The converted PDF will open directly in Safari, the Files app, or Mail on your iPhone with no additional software needed. Your file is deleted from our servers within 60 seconds of conversion.
Will the PDF conversion keep attachments and formatting from the original email?
The email body, headers (sender, recipient, subject, date), and inline images are preserved in the PDF. However, file attachments embedded inside the .msg — such as a spreadsheet or Word document attached to the email — are not extracted into the PDF output. If you need those attachments, you will have to open the original .msg on a Windows or Mac machine with Outlook installed to save them separately.