The best options for transferring Webmail emails between Mac and Windows is DataVare IMAP Backup. It works with any IMAP-supported account, such as Gmail, Yahoo, Outlook.com, or custom domain mail. You can download or move mailboxes into formats including PST, MBOX, EML, MSG, and more. The software makes sure that attachments, folder structure, and email attributes stay the same, so nothing is lost during the move. It works on both Mac and Windows computers, lets you back up only certain folders and dates, and lets you try it out for free before you buy it.

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