CDO邮件问题＆＃34;传输无法连接到服务器＆＃34;

Question

我正在尝试在Excel文件中设置用户表单，该文件发送电子邮件以报告用户使用电子表格找到的任何错误/问题。

Dim iMsg As Object
Dim iConf As Object
Dim Flds As Variant

Set iMsg = CreateObject("CDO.Message")
Set iConf = CreateObject("CDO.Configuration")

iConf.Load -1
Set Flds = iConf.Fields

With Flds
    .Item("http://schemas.microsoft.com/cdo/configuration/smtpusessl") = True
    .Item("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
    .Item("http://schemas.microsoft.com/cdo/configuration/sendusername") = "bugreporter@gmail.com"
    .Item("http://schemas.microsoft.com/cdo/configuration/sendpassword") = "password"
    .Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "smtp.gmail.com" 'smtp mail server
    .Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
    .Item("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25 'stmp server
    .Update
End With

With iMsg

    Set .Configuration = iConf
    .To = "example@domain.com"
    .From = "bugreporter@gmail.com"
    .Subject = "Hello"
    .TextBody = "Hi Dude"
    .Send
End With

Set iMsg = Nothing
Set iConf = Nothing

我收到错误＆＃34;传输无法连接到服务器＆＃34;。我不太了解端口/端口转发，但我尝试过端口25,465和587，但没有一个工作。我是从工作网络运行的，但我假设至少有一个端口必须打开，因为我们在所有人的计算机上运行Outlook。

我已在Gmail帐户上启用了IMTP，并允许安全性较低的应用。