On 2025-01-12 16:01, Scott K via Postfix-users wrote:
> Yes they're open then

Isn't Linode blocking port 25 by default? Just do:

# nc -l -p 25

- this will tell you 2 things:
1. if the port is locally available, or already bound,
2. when available, if you're able to connect to it remotely.
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