IT/Security
SMTP Relay 설정 및 EXPN, VRFY 명령어 활성 테스트
Hotman
2016. 9. 30. 10:42
- Relay 설정 확인
[root@test]~# nc -vv X.X.X.X 25
220 XX.example.com ESMTP Postfix (Ubuntu)
EHLO
..............
mail from:<test@example.com>
250 2.1.0 Ok
rcpt to:<receive@example.com>
250 2.1.5 Ok
dat
354 End data with <CR><LF>.<CR><LF>
This is Spam test.
.
250 2.0.0 Ok: queued as xxx
quit
221 2.0.0 Bye
- EXPN, VRFY 테스트
$ telnet X.X.X.X 25
Trying X.X.X.X...
Connected to X.X.X.X.
Escape character is '^]'.
220 smtp-relay.exanple.com ESMTP Postfix
VRTY root
502 5.5.2 Error: command not recognized
EXPN root
502 5.5.2 Error: command not recognized
quit
221 2.0.0 Bye
Connection closed by foreign host.