Someone saved an email by dragging it out of Outlook, and now nothing on your machine opens it. Drop the .msg here, get a standard .eml back — attachments and all.
.msg is Outlook’s private container — a Microsoft compound file, not a mail standard. Almost every other mail program reads .eml (plain RFC 822, the format email actually travels in). The conversion unpacks headers, body and attachments into that standard form.
Yes — attachments, inline images and the HTML body are carried into the .eml as normal MIME parts. Open the result in Apple Mail or Thunderbird and save them from there, or in a pinch rename it to .txt and read it raw.
One at a time here for now. If you have a whole mailbox’s worth, the original .pst archive — if you still have it — is the better route: PST extraction does the entire mailbox in one pass.
It’s written to a private temporary folder for the few seconds the conversion engine needs, then deleted — nothing is retained, logged or shared. No account, no email, no “files kept for 24 hours” fine print. These are often someone’s letters, family records or old business files; we treat them accordingly.