I have several MBOX files saved from an old email client, and I want to move them to my current IMAP email account. I need a method that keeps the original emails, attachments, and folder structure intact. Is there a way to upload MBOX files directly to an IMAP server without importing them into another email client first?
You can transfer MBOX emails to an IMAP server using an email migration tool or a compatible email client. The manual method usually involves importing the MBOX file into an email application, adding your IMAP account, and moving the emails into the appropriate server folders. However, this process can become time-consuming when you have multiple archives.

Another option is to use the MacSonik MBOX to IMAP Server migration feature. It allows users to select MBOX files, preview their mailbox data, connect to the destination IMAP account, and migrate the selected emails. Before starting, check the server hostname, port number, encryption settings, and login requirements.