Server SMTP – Connection timed out

hello,

I decided to use this plugin to set up an smtp server, unfortunately it doesn’t work and gives me “Connection timed out”.

I’ve already had the spf record set up for the domain, I’ve had the site’s ip set on the server.

—-

In the plugin conectivity it tells me:
?</img> Port 465 is open, but not to mailing.assosoftware.it.
?</img> Port 587 is open, but not to mailing.assosoftware.it.
?</img> Port 25 is open, but not to mailing.assosoftware.it.

A test with “No” Service Available indicates one or more of these issues: Your web host has placed a firewall between this site and the Internet
The SMTP hostname is wrong or the mail server does not provide service on this port (this is not possible because it is correct)
Your PHP configuration is preventing outbound connections
Your WordPress configuration is preventing outbound connections

——

I’ve already checked with the hosting and they haven’t found any anomalies

The only thing I’ve checked that could be is that no mx record has been set in the domain

Mailer: postsmtp
HostName: academy.assosoftware.it
cURL Version: 7.81.0
OpenSSL Version: OpenSSL/3.0.2
OS: Linux pod-212094 5.10.147+ #1 SMP Sat Oct 15 09:06:22 UTC 2022 x86_64
PHP: Linux 8.0.27 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 6.1.1 it_IT UTF-8
WordPress Theme: LifterLMS LaunchPad Child
WordPress Plugins: Post SMTP, WP Engine Smart Plugin Manager, PublishPress Capabilities, Cookie banner plugin for WordPress – Cookiebot CMP by Usercentrics, Simple Custom CSS and JS, Yoast Duplicate Post, Elementor Pro, Elementor, Events Widgets For Elementor And The Events Calendar, FluentCRM – Marketing Automation For WordPress, LifterLMS Blocks, LifterLMS Custom Fields, LifterLMS Labs, LifterLMS, Login as User, The Events Calendar, Toolset Blocks, Toolset Module Manager, Toolset Types, Yoast SEO, WPForms User Registration, WPForms
WordPress wp_mail Owner: /nas/content/live/assosoftware/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress phpmailer_init Action(s): PostsmtpMailer->phpmailer_smtp_init
Postman: 2.4.2
Postman Sender Domain (Envelope|Message): assosoftware.it | assosoftware.it
Postman Prevent Message Sender Override (Email|Name): Yes | Yes
Postman Active Transport: SMTP (smtp:none:none://mailing.assosoftware.it:2525)
Postman Active Transport Status (Ready|Connected): Yes | No
Postman Deliveries (Success|Fail): 1 | 48

The page I need help with: [log in to see the link]