Yes, you can
export IMAP emails to MSG files without Outlook by using specialized Converetrtool
IMAP to IMAP Converter. This software connects directly to your IMAP account, allowing you to select folders or specific emails and save them in MSG format. It preserves attachments, metadata, and email structure. Features like bulk export, mail filters, and skipping previously migrated emails make the process efficient. Once exported, the MSG files can be stored locally or opened in any compatible email client. No Outlook installation is required.