No route to host

[phpg33k]

My email has been running smoothly, until 1:30pm EST today.

All of a sudden, no emails are able to send. I disabled the firewall and flushed IP tables, still nothing.
I continue to get No route to host with all emails.

I have almost 1300 emails just sitting in my queue.

Running this

telnet ASPMX.L.GOOGLE.com 25

I get

Trying 173.194.68.27...
telnet: connect to address 173.194.68.27: No route to host
Trying 2607:f8b0:400d:c02::1a...
telnet: connect to address 2607:f8b0:400d:c02::1a: Network is unreachable

I can ping 173.194.68.27 with no problem.

ping 173.194.74.26
PING 173.194.74.26 (173.194.74.26) 56(84) bytes of data.
64 bytes from 173.194.74.26: icmp_seq=1 ttl=49 time=56.9 ms
64 bytes from 173.194.74.26: icmp_seq=2 ttl=49 time=56.9 ms
64 bytes from 173.194.74.26: icmp_seq=3 ttl=49 time=56.7 ms
64 bytes from 173.194.74.26: icmp_seq=4 ttl=49 time=57.3 ms
64 bytes from 173.194.74.26: icmp_seq=5 ttl=49 time=57.0 ms
64 bytes from 173.194.74.26: icmp_seq=6 ttl=49 time=56.7 ms
64 bytes from 173.194.74.26: icmp_seq=7 ttl=49 time=57.5 ms
64 bytes from 173.194.74.26: icmp_seq=8 ttl=49 time=57.1 ms
64 bytes from 173.194.74.26: icmp_seq=9 ttl=49 time=57.2 ms
64 bytes from 173.194.74.26: icmp_seq=10 ttl=49 time=56.8 ms
64 bytes from 173.194.74.26: icmp_seq=11 ttl=49 time=57.0 ms
64 bytes from 173.194.74.26: icmp_seq=12 ttl=49 time=57.0 ms
64 bytes from 173.194.74.26: icmp_seq=13 ttl=49 time=56.8 ms
64 bytes from 173.194.74.26: icmp_seq=14 ttl=49 time=57.1 ms
64 bytes from 173.194.74.26: icmp_seq=15 ttl=49 time=57.2 ms
64 bytes from 173.194.74.26: icmp_seq=16 ttl=49 time=57.0 ms
64 bytes from 173.194.74.26: icmp_seq=17 ttl=49 time=57.3 ms
64 bytes from 173.194.74.26: icmp_seq=18 ttl=49 time=56.8 ms
64 bytes from 173.194.74.26: icmp_seq=19 ttl=49 time=57.1 ms
^C
--- 173.194.74.26 ping statistics ---
19 packets transmitted, 19 received, 0% packet loss, time 18333ms
rtt min/avg/max/mdev = 56.722/57.072/57.527/0.292 ms

So my question is, where is this port being blocked and how can I correct this?

 

[cPanelMichael]

Hello

Are you experiencing the same problem when attempting to connect to other remote hosts besides Google? If so, I recommend consulting with your data center or upstream provider. It sounds like there may be a firewall in place outside of your server causing this problem if the issue persists when you disable iptables.

Thank you.