>Still not sure how to send an email that consists of a single dot on its own li... | Hacker News

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knome on June 8, 2021 | parent | context | favorite | on: Althttpd: Simple webserver in a single C file

>Still not sure how to send an email that consists of a single dot on its own line though.

It seems you prefix any line of data starting with a period with an additional period, to therefore distinguish it from the end of mail period.

https://datatracker.ietf.org/doc/html/rfc5321#section-4.5.2

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