SMTP Problem

[PQB]

Hello. i tried to used SMTP but there's an error. Please see below


2023-03-10 11:36:40 Connection: opening to smtp.acumbamail.com:25, timeout=300, options=array()
2023-03-10 11:36:42 Connection failed. Error #2: stream_socket_client(): unable to connect to smtp.acumbamail.com:25 (Connection refused) [/home/admin3ping/public_html/vendor/phpmailer/phpmailer/src/SMTP.php line 389]
2023-03-10 11:36:42 SMTP ERROR: Failed to connect to server: Connection refused (111)
SMTP connect() failed. https://github.com/PHPMailer/PHPMail...roubleshooting