Error 500 connection refused

[JxstErg1]

I don’t think the OP’s accessing the database by the IP address; he was trying to connect to a supposed SMTP server (hence the port 465 for SSL/TLS connections) at localhost which doesn’t work as free hosting web servers don’t have any mail server on; plus SMTP connections to external mail services only work with STARTTLS and port 587.

@TIzzy01, since you were trying to configure a SMTP server, you might have to use an external one instead of an internal one; here’s a guide to use Gmail’s SMTP service:

How to send email with Gmail SMTP

Outgoing email with PHP mail() is heavily restricted on InfinityFree. Fortunately, you can still whatever email you want using an external email service. There are many external email providers to choose from. InfinityFree doesn’t restrict sending email with external providers. Almost all of them have paid plans, but some have free tiers too. Most of them support sending email over SMTP, some of them have custom APIs, libraries and plugins which you can use too. A simple way to get started qui…

To configure it with your software, there should already be a DSN for Gmail they already created for you to use; here is its documentation:

Mailer