Send CDO emails from any client/server with Excel - vba

Question

I'm trying to set up an .xlsm workbook to send emails to different email addresses with specific data from the spreadsheet.
I want that it doesn't matter what email client or server is used.
I'm currently trying to get it working for hotmail.
Here's my code:
Sub Button1_Click()
Dim CDO_Mail As Object
Dim CDO_Config As Object
Dim SMTP_Config As Variant
Dim strSubject As String
Dim strFrom As String
Dim strTo As String
Dim strCc As String
Dim strBcc As String
Dim strBody As String
strSubject = "SUBJECT"
strFrom = "******#hotmail.com"
strTo = "************#hotmail.com"
strCc = ""
strBcc = ""
strBody = "BODY TEXT HERE"
Set CDO_Mail = CreateObject("CDO.Message")
Set CDO_Config = CreateObject("CDO.Configuration")
CDO_Config.Load -1
Set SMTP_Config = CDO_Config.Fields
With SMTP_Config
.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
.Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "smtp.live.com"
.Item("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
.Item("http://schemas.microsoft.com/cdo/configuration/sendusername") = "******#hotmail.com"
.Item("http://schemas.microsoft.com/cdo/configuration/sendpassword") = "password"
.Item("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
.Item("http://schemas.microsoft.com/cdo/configuration/smtpusessl") = True
.Update
End With
With CDO_Mail
Set .Configuration = CDO_Config
End With
CDO_Mail.Subject = strSubject
CDO_Mail.From = strFrom
CDO_Mail.To = strTo
CDO_Mail.TextBody = strBody
CDO_Mail.CC = strCc
CDO_Mail.BCC = strBcc
CDO_Mail.Send
MsgBox ("Emails have been sent.")
End Sub
I get the following error:
Run-time error '-2147220975 (80040211)'
The message could not be sent to the SMTP server, The transport error code was 0x80040217. The server response was not available.
I've also tried changing the port from 25 to 587 and I get the error:
The transport failed to connect to the server.
I also initially didn't have the 2 following lines in there:
.Item("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
.Item("http://schemas.microsoft.com/cdo/configuration/smtpusessl") = True
And when they weren't there I got the error:
The server rejected the sender address. The server response was: 530 5.7.0 Must issue a STARTTLS command first.