telnet localhost smtp
telnet localhost pop3 를 실행하면 둘다 동작을 합니다.
로컬에서 로컬로 보내면 메일은 수신되구요.
외부에서 보내면 다음과 같은 에러가 납니다.


- This is only a notification about a delay in the delivery of your message
- There is no need to resend your message at this time.
- The following recipients have not yet received your message:

****@****; Action: Delayed

- The server will continue trying for up to 4 hours.

Reporting-MTA: dns; mail01.netian.com
Arrival-Date: Tue, 7 May 2002 16:53:47 +0900

Final-Recipient: rfc822; ****@****
Action: Delayed
Status: 4.4.0 (other or undefined network or routing status)
Will-Retry-Until: Tue, 7 May 2002 21:53:47 +0900
Return-Path: <****@****>
Received: by mail01.netian.com (5.1.048.1k) id 3CCDB3DA002E462F for ****@****; Tue, 7 May 2002 16:53:47 +0900
Message-ID: <****@****>
Date: Tue, 7 May 2002 16:53:46 +0900
From: ****@****
Subject: =?EUC-KR?Q?=B1=D7=B7=E7=20=B8=DE=C0=CF=20=C5=D7=BD=BA=C6=AE?=
To: ****@****
Disposition-Notification-To: ****@****
MIME-Version: 1.0
Importance: Normal
Content-Type: text/plain; charset="EUC-KR"
Content-Transfer-Encoding: quoted-printable