CODEWITHSUNDEEP
c#smtp.net-8.0mailmessage
djangojazz
djangojazz

Reputation: 13272

MailMessage just spins and spins and never sends in .NET 8 with Office 365

I was following this link here: https://learn.microsoft.com/en-us/dotnet/api/system.net.mail.mailmessage?view=net-8.0&redirectedfrom=MSDN

I have done something similar in the past but I am now using Office 365 where everything is just hosted online. Is there something else that needs to be setup for SMTP to work? I just see the code spin and spin and it never progresses, never sends, just spins forever and tells me nothing.

using System.Collections;
using System.Net.Mail;
using System.Net.Mime;
using System.Net;

string server = "smtp.office365.com";
var user = "user";
var password = "password";
var from = "[email protected]";
var to = "[email protected]";
var subject = "CSharp sent message";
var body = "Sent from code that is being made by Mail Message";

var message = new MailMessage(from, to, subject, body);

var client = new SmtpClient(server);
//client.Credentials = CredentialCache.DefaultNetworkCredentials;
new NetworkCredential(user, password, "domain.com");
//client.Port = 465; //465 or 587

try
{
    //NOTE: Neither this or below line will work.  They both just spin.
    //await client.SendMailAsync(from, to, subject, body);
    client.Send(message);
    client.SendCompleted += (o, s) =>
    {
        o.ToString();
        var obj = s;
        obj.ToString();
    };
    Console.WriteLine("Sent");
}
catch (Exception ex)
{
    _ = ex;
}

Picture for clarity. I can step over line 24 and it doesn't fail, doesn't get to the next line. Just doesn't do anything. enter image description here

Upvotes: 0

Views: 203

Answers (1)

djangojazz
djangojazz

Reputation: 13272

So the answer is to change a few lines to:

var client = new SmtpClient(server, 587);
client.EnableSsl = true;
client.Credentials = new NetworkCredential(user, password);

It appears 465 won't work and still just spins and spins -\ 0 /-. I don't know, I don't work for MS. Given it says not to keep using this method for new code I'm just using this temporarily for a small thing and then would recommend to anyone reading this to looking into mailkit

Upvotes: 0

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