“知る人ぞ知る「秘密の図書室」” threads初めた瞬間にここの投稿がTLに流れてきた来たんだけどこんな「秘密」で大丈夫かな？/「秘密」なら他SNSへの発信は自重しておく

Mailpit is a free, open-source SMTP testing tool built with Go and Vue. It provides a modern web UI for viewing and testing emails, and includes a REST API for integration testing.