There are multiple solution in the market but I will recommend you can also try ZOOK Email Backup Software. The tool enables you to save your email backup from your email account into 30+ saving options. Emails can be easily downloaded to file formats, webmail, and cloud-based email accounts. It offers to export emails from email account to PST, EML, MSG, MBOX, EMLX, CSV, PDF, ZIP, DOCX, MHT, RTF, Windows Live Mail, Lotus Notes, Thunderbird, Outlook.com, Yahoo, G Suite, Exchange Server, IMAP, Zimbra, Rediffmail, IBM Verse, Amazon WorkMail, IceWarp, etc.

To know more visit at:- https://www.zooksoftware.com/email/backup/