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android - Edison mail - https://play.google.com/store/apps/details?id=com.easilydo.mail
review https://www.theverge.com/2020/4/7/21211802/onmail-edison-mail-email-service-app-privacy-tracking-read-reciepts
origin - https://www.pipiscrew.com/?p=18087 onmail-is-a-new-privacy-focused-email-service-from-the-company-behind-edison-mail