Mail server outgoing port issue

Hi,

I recently restored a backup and since then the staff are not receiving mail from SupportCenter Plus. When I setup the mail account in Outlook it works fine. However, when I set it up on SCP. I get this message in the System Log.

Outgoing mail server settings infomation:

sever name/ IP address - smtp.pcubed.biz
Alternate server name/ IP address -
Email type - SMTP
Port - 25
Transport Layer Security - Enabled
Authentication username (smtp username) - support@pcubed.biz

My outgoing port I'm using is actually 587 and that is the setting I'm saving. Why is the log showing port 25, and how do I change it to use port 587?

Thanks
Reece