Cannot send email using SmtpClient in ASP.NET

Question

I want to send email in ASP.NET MVC website but it doesn't work.

I think the problem is with this exception here

'client.ServicePoint.Address' threw an exception of type 'System.NotSupportedException' with type System.Uri {System.NotSupportedException}.

after the code

var client = new SmtpClient("smtp.office365.com", 25)

In this document https://learn.microsoft.com/en-us/dotnet/api/system.net.servicepoint.address?view=netcore-3.1, it says the exception is due to "The ServicePoint is in host mode." which I have no idea.

Could anyone explain it and tell me how to resolve?

Thanks,

The true issue is the port number I'm using is not correct.... should use 587... — tomography, Jul 08 '20 at 20:50

Eisenbiegler · Accepted Answer · 2023-07-04T08:12:15.447

0

In .NET, SMTP settings has its own config section (beneath the system.net element) in the app.config and web.config file:

<mailSettings>
    <smtp deliveryMethod="Network">
      <network host="smtp.office365.com" port="25" enableSsl="true" />
    </smtp>
</mailSettings>

You can read more about SMTP here

And this answer in the community may help you.

edited Jul 04 '23 at 08:12

answered Jul 08 '20 at 10:13

Eisenbiegler

1

Thanks, the issue is the port number I'm using is incorrect.... – tomography Jul 08 '20 at 20:51
Perfect! I will update this answer with your solution :> – Eisenbiegler Jul 08 '20 at 20:58

1 Answers1