apizio.com
Hwasongpho-19 — a private mail-sending workspace run by a single operator.
What runs here
The application is a Python/Flask service used by its operator to compose and send mail for a small set of campaigns. It has no public sign-up, no bulk sending API, and no inbound mailboxes. Access is limited to the operator.
How mail leaves this host
- Messages are submitted through provider HTTP/API endpoints (Microsoft Graph, GMX) on ports 443/587.
- Nothing on this server listens for incoming SMTP, stores mailboxes, or relays mail for third parties.
- This host is not an MX for any domain.
What outbound port 25 is used for
Before a message is submitted, the application checks that each recipient
address is deliverable. That check is a short outbound SMTP conversation with
the recipient domain's own mail exchanger: connect, greet, ask about the
recipient in RCPT TO, read the reply, disconnect.
No message data is transmitted — the session ends at QUIT, before
DATA. The only purpose is to let the operator see a typo or a
closed mailbox in advance instead of after a bounce.
Status
Online — mail.apizio.com resolves to this host and is used as the
greeting name for those outbound SMTP sessions.