Q: I use an IMAP mail server. Where are my Apple Mail attachments stored?
A: They are stored on the mail server and also cached on your computer with messages in your Inbox (INBOX.imapmbox). This is different from Eudora, which stores attachments in your Attachments folder, separate from the messages. Apple Mail’s Inbox is stored in your home directory, in this location: Library>Mail>IMAPusername @yourmailserver>INBOX.imapmbox (where username is your username and yourmailserver is your mail server’s hostname, such as po14.mit.edu).
If you’ve created subfolders on the IMAP mail server, their .imapmbox files can be found in the INBOX folder, in the same location as your INBOX.imapmbox file.
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