SMTP Error – frustrating

Here is the error log.
Yes, the username and password are correct.
Any ideas, please?

Versions:
WordPress: 6.1.1
WordPress MS: No
PHP: 7.3.33
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: in-v3.mailjet.com
Port: 587
SMTPSecure: tls
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.1.1p 21 Jun 2022
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:
2022-11-23 13:44:34 Connection: opening to in-v3.mailjet.com:587, timeout=300, options=array()

2022-11-23 13:44:35 Connection failed. Error #2: stream_socket_client(): unable to connect to in-v3.mailjet.com:587 (Connection refused) [/home/y4vlzrrz1ldu/public_html/edsumner.com/wp-includes/PHPMailer/SMTP.php line 389]

2022-11-23 13:44:35 SMTP ERROR: Failed to connect to server: Connection refused (111)

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