Office 365 installation stopped Contact 7 Form working

I set Office 365 up and this due to DNS MX changes stopped my Contact 7 Form working. Tried to setup the WP Mail SMTP form up but get the following error. Help please.

Versions:
WordPress: 4.9.4
WordPress MS: No
PHP: 5.4.43
WP Mail SMTP: 1.2.5

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: box879.bluehost.com (SSL)
Port: 465
SMTPSecure: string(0) “”
SMTPAutoTLS: bool(false)
SMTPAuth: bool(true)

Server:
OpenSSL: Yes
SMTP Debug:
2018-03-28 21:06:09 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting