Unable to connect to (Network is unreachable)

Hello, I am unable to connect to from droplet. Here is log from telnet:

altera@genius-camp:~$ telnet 587 Trying… Trying… Trying 2a00:1450:400c:c04::6d… telnet: Unable to connect to remote host: Network is unreachable

This droplet was created from snapshot of another droplet from different account and on the old one this works fine

Can you help me with this?

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If you are using Postfix, you have to change a parameter in Postfix configuration, inet_protocols to ipv4:

postconf -e inet_protocols=ipv4

and restart/reload the postfix service

Certain accounts may have outgoing blocks on SMTP ports, you may need to contact DO support to see if that’s the case on your account:

Yes me to

telnet: Unable to connect to remote host: Network is unreachable