Vultr에서는 문서에도 적어놓지도 않았는데 25번을 막아 메일이 안 오는 것이였습니다

Vultr Staff

2018-12-11

Greetings,

SMTP port 25 is blocked by default on many accounts for spam control purposes.  We need some additional information before removing the SMTP filter.  Please reply with the following details :

1. The name of your business or organization and any URLs which you offer services from.

2. A precise description of the nature and contents of the emails you intend to send.

3. The amount of email that you will deliver on a daily or monthly basis.

This information helps us wisely decide account settings and resource limits in order to ensure high quality service and the integrity of our networks, systems, and reputation.  Thank you for your cooperation.

Regards,

--, Systems Administrator

정말로.. 삽질을 몇 번했는지 몰라요