Lukas Beran @lukasberan.com ยท May 7 ๐๐จ๐ฐ ๐ญ๐จ ๐ญ๐ฎ๐ซ๐ง ๐จ๐ง ๐ข๐ง๐๐จ๐ฎ๐ง๐ ๐๐๐๐ ๐๐๐๐ ๐ข๐ง ๐๐๐๐ข๐๐ 365 Inbound SMTP DANE is a security protocol designed to secure email communication by ensuring the authenticity of the receiving mail server's encryption certificates when emails are delivered via the Simple Mail Transfer Protocol (SMTP).
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By default, SMTP doesn't guarantee encryption, which makes it vulnerable to man-in-the-middle attacks. To secure email communication, SMTP can use STARTTLS, which upgrades a plain text connection to an encrypted one.