how to unblock port 547 on ubuntu droplet

i want to send email from registration form on PHP Codeigniter but its seem like port 547 is blocked

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Hi @amjadgul05,

You’ll need to allow access on the port. If you are using only IPtables, Digital Ocean have a pretty good article about how to do it - ARTICLE

If you have installed csf for instance, you can allow the mentioned port in the configuration file


and then

TCP_OUT = some port, some port, 547, some port

I hope the above helps,

Kind regards, Kalin