Smtp error on wordpress

Support and Discussion
1

Hello, I can’t fix it no matter what I did.
Where do you think is the problem?

Versions:
WordPress: 6.1
WordPress MS: No
PHP: 7.3.12
WP Mail SMTP: 3.6.1

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server SMTP code: 111 Additional SMTP info: Connection refused
Host: mail.kemaltekin.net
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.0.2k 26 Jan 2017
Apache.mod_security: No

Debug:
Email Source: WP Mail SMTP
Mailer: Other SMTP
SMTP Error: Could not connect to SMTP host. Failed to connect to serverSMTP server error: Failed to connect to server SMTP code: 111 Additional SMTP info: Connection refused

SMTP Debug:
2022-11-05 16:48:52 Connection: opening to ssl://mail.kemaltekin.net:465, timeout=300, options=array()

2022-11-05 16:48:52 Connection failed. Error #2: stream_socket_client(): unable to connect to ssl://mail.kemaltekin.net:465 (Connection refused) [/home/kemalltekin.net/public_html/wp-includes/PHPMailer/SMTP.php line 389]

2022-11-05 16:48:52 SMTP ERROR: Failed to connect to server: Connection refused (111)

SMTP Error: Could not connect to SMTP host. Failed to connect to server
2

Welcome @maxwell Happy you are here

verify the validity of mail server’s SSL certificate: openssl s_client -connect mail.kemaltekin.net:25 -starttls smtp

change connecting ports:

Confirm your ports here https://SERVER_URL/email/listEmails → Choose kemaltekin.net NOT mail.kemaltekin.net look for Details To Configure Mail Clients e.g.

SMTP Details
Server Hostname mail.kemaltekin.net
Port 25
Port 587 (SSL)
Port 465 (SSL)
SSL STARTTLS
3

SSL is working and all my settings are correct but I can’t use it on wordpress

SMTP Details
Server Hostname mail.kemaltekin.net
Port 25
Port 587 (SSL)
Port 465 (SSL)
SSL STARTTLS

I installed the gmail smtp plugin and it works fine.

4

Ok good. Maybe wrong SMTP authentication details on your plugin. Test that out by changing password if you are at liberty to

5

How can I be sure that port 465 is working?

firewall-cmd --zone=public --permanent --add-port=465/tcp
FirewallD is not running
6

I ruled out firewall issues because you said here

it works in other ways unless you changed something after that test

Try NON-ssl ports thats a starting point

7

Thank you for your attention @josephgodwinke, I will switch to another panel, unfortunately, the cyberpanel is very inadequate and everything is charged.