Port 25 is blocked inbound and outbound

OgreMHDW

• July 04, 2017 10:00

I am trying to find out what I could have done to "block" port 25. When attempting to telnet from outside the system, I get: Microsoft Telnet> open server 25 Connecting To server...Could not open connection to the host, on port 25: Connect failed I am able to telnet on the server, to itself: root@server [/etc]# telnet server 25 Trying x.x.x.x... Connected to server. Escape character is '^]'. 220-server ESMTP Exim 4.89 #1 Tue, 04 Jul 2017 07:57:24 -0700 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail. I can then perform normal mail commands. When attempting to telnet from inside to Google: root@server [/etc]# telnet google.com 25 Trying 216.58.219.14... telnet: connect to address 216.58.219.14: Connection refused Trying 2607:f8b0:4007:806::200e... telnet: connect to address 2607:f8b0:4007:806::200e: Network is unreachable Does anyone have any ideas? I am at a loss of where to go from here.

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  cPanelMichael

  • July 04, 2017 15:28

  Hello, It's not uncommon for service providers to block access to port 25 as a SPAM prevention technique. I recommend contacting them to see if that's the case. Thank you.

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