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Show HN: MailMark – Cold email tool where you own your domain and mailboxes
自建域名和邮箱的冷邮件工具，让你完全掌控邮件数据，适合追求隐私和自主权的营销者。
Hi, I am Debasish from India. I am passionate about building softwares. I started coding long ago around 2015 when android apps were built only Java. …