Email is very important to my company, please check for me what is the problem, and how to solve it,
you are from the virtumin team, you are expert, you can find out the problem for me, and provide solution for me, thank you
If you run the following command on your server where you’re sending mail from, what output do you get:
telnet mail.virtualmin.com 25
root@vmi1234742:~# telnet mail.virtualmin.com 25
Trying 45.76.233.251...
telnet: Unable to connect to remote host: Connection refused
root@vmi1234742:~#
You have your answer. Contact your ISP and ask why they suddenly started blocking port 25 for your system.
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