Set port does not match error output

Replies: 0

I have the port set to 587 but am getting the following error output:
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Versions:
WordPress: 4.9.4
WordPress MS: No
PHP: 5.6.33
WP Mail SMTP: 1.2.5

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: smtp.1and1.com
Port: 25
SMTPSecure: tls
SMTPAutoTLS: bool(false)
SMTPAuth: bool(true)

Server:
OpenSSL: Yes
SMTP Debug:
[empty]
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Why is the output showing port 25 when I have the port set to 587? Thanks for your help.