Cannot connect to Postfix on port 587
I have installed Postfix on a droplet, and configured it to work on ports 25 and 587.
I’m unable to make a connection remotely.
If I do the following from the droplet itself:
> telnet localhost 587
I get a reply from Postfix.
However if from my either my local system or the droplet itself I do:
> telnet server.domain.com 587
Unable to connect to remote host: Connection refused
I have read that DigitalOcean often block ports 25 and 587 by default, but I have contacted support and been assured by multiple agents that they are not blocking those ports on our droplet.
Is there anything else I can try?
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