Created
October 30, 2017 17:13
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check smtp port
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| Type the following command: | |
| telnet example.com 25 | |
| If Port 25 is not blocked, you will get a successful 220 response (text may vary). | |
| Trying 64.13.192.208... | |
| Connected to example.com. | |
| Escape character is '^]'. | |
| 220 cl34.gs01.gridserver.com ESMTP Exim 4.63 Tue, 24 Jun 2008 13:45:04 -0700 | |
| If Port 25 is blocked, you will get a connection error or no response at all. | |
| Trying 64.13.192.208... | |
| telnet: connect to address 64.13.192.208: Connection refused | |
| telnet: Unable to connect to remote host | |
| TIP: | |
| You can use this same technique to check if Port 587 is blocked as well. Just use the following command: | |
| telnet example.com 587 |
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