On 15/02/18 11:03, Hendra Soewondo wrote:
>> Maksudnya check port itu bagaimana persisnya?
> 
> Menggunakan website ping.eu gitu pak. kan ada port check.


Host march.com adalah web server bukan mail server, jadi yang open adalah tcp
port 80 (http) dan (mungkin) tcp port 443 (https).

$ host -t a marsh.com
marsh.com has address 54.208.44.25

$ host -t a www.marsh.com
www.marsh.com has address 34.248.101.155
www.marsh.com has address 54.72.182.178

Mail server namanya MX (Mail eXchanger) host.
Jadi periksa dulu apa nama MX hostnya, setelah itu check port terhadap MX host.

https://www.dnsqueries.com/en/mx-lookup.php

>> Mail domain marsh.com menggunakan relayhost (Mail firewall/gateway) untuk 
>> terima mail.
> 
> Ini bagaimana pak untuk mengetahuinya kalau domain tersebut menggunakan mail 
> firewall/gateway?

Salah satu cirinya MX hostnya hanya open smtp port (tcp port 25).

silakan periksa ke MX host berikut

$ host -t mx marsh.com
marsh.com mail is handled by 10 mx13.marsh.com.
marsh.com mail is handled by 10 mx12.marsh.com.
marsh.com mail is handled by 10 mx11.marsh.com.
marsh.com mail is handled by 10 mx10.marsh.com.
marsh.com mail is handled by 10 mx09.marsh.com.
marsh.com mail is handled by 10 mx08.marsh.com.
marsh.com mail is handled by 10 mx53.marsh.com.
marsh.com mail is handled by 10 mx52.marsh.com.
marsh.com mail is handled by 10 mx51.marsh.com.
marsh.com mail is handled by 10 mx50.marsh.com.




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syafril
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Syafril Hermansyah
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