SMTP 서비스에 문제가 있는지 모르겠습니다

[satonotdead]

보안 옵션이 매우 정확하지 않으므로 확인해야 합니다. 그리고 보안에 문제가 없도록 끄야 합니다.

Setting up SMTP

If you want to disable TLS, you need to uncomment this line, and set it to false: #DISCOURSE_SMTP_ENABLE_START_TLS: true # (optional, default true) However, there’s no relationship between POODLE and newer TLS protocol versions, nor is there any relationship between SMTP and POP3. Mailgun does support TLS on SMTP connections, they just don’t support it correctly.