ISPconfig3 Mail settings, server configuration.

[pehden]

I am being forced by my ISP to use smtp.google.com well the issue is the only option i have in the admin panel is using username domain and password. but there is no option for port, and it defaults to port 25.

I need to use
Outgoing Mail (SMTP) Server - requires TLS: smtp.gmail.com (use authentication)
Use Authentication: Yes
Use STARTTLS: Yes (some clients call this SSL)
Port: 465 or 587
Account Name: your Gmail username (including '@gmail.com')
Email Address: your original isp address (username@isp.c0m)
Password: your Gmail password

But there is no option unless I'm missing something.

[till]

Enter the relay host like this:

smtp.gmail.com:465

[pehden]

I will try that and respond if fail.