How do I change the SMTP Client, User and Password dynamically in MVC Mailer? - smtpclient

Question

In the step by step guide at:
https://github.com/smsohan/MvcMailer/wiki/MvcMailer-Step-by-Step-Guide
It is stated that the .net mail lib is used (System.Net.Mail).
In medical transactions, there is a need to change servers based on country region and record if the mail message was sent with status.
.net mail lib will do this but I have trouble understanding where to put the following code pieces when Using MVC Mailer:
.net Mail Lib-->
SmtpClient client = new SmtpClient(server, port);
client.credentials = CredentialCache.DefaultNetworkCredentials;
MVC Mailer-->
public ActionResult SendWelcomeMessage()
{
UserMailer.SmtpClient(server, port);
UserMailer.credentials = CredentialCache.DefaultNetworkCredentials;
UserMailer.Welcome().SendAsync();
return RedirectToAction("Index");
}
static bool mailSent = false;
private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
{
// Get the unique identifier for this asynchronous operation.
String token = (string) e.UserState;
if (e.Cancelled)
{
Console.WriteLine("[{0}] Send canceled.", token);
}
if (e.Error != null)
{
Console.WriteLine("[{0}] {1}", token, e.Error.ToString());
} else
{
Console.WriteLine("Message sent.");
}
mailSent = true;
}
if MailSent is false, then write to Critical Log Error.
I am not sure where the client setting for .net setting should go.
Should they go in the controller as I have done above or in the Mailer method.
Thanks for any advice.
Regards,
Vic

Answer 1

I had the same need.
To do so, i have created a custom mail sender class :
Public Class CustomMailSender
Inherits System.Net.Mail.SmtpClient
Implements ISmtpClient
Public Sub Init(senderEmail As String, password As String)
Me.Credentials = New System.Net.NetworkCredential(senderEmail, password)
End Sub
Public Overloads Sub SendAsync(mail As MailMessage) Implements ISmtpClient.SendAsync
MyBase.SendAsync(mail, Nothing)
End Sub
Public Overloads Sub SendAsync(mail As MailMessage, userToken As Object) Implements ISmtpClient.SendAsync
MyBase.SendAsync(mail, userToken)
End Sub
Public Overloads Sub Send(mail As MailMessage) Implements ISmtpClient.Send
MyBase.Send(mail)
End Sub
Public Shadows Event SendCompleted(sender As Object, e As System.ComponentModel.AsyncCompletedEventArgs) Implements ISmtpClient.SendCompleted
End Class
Then inside your email controller, you use it like that
Public Class EmailController
Inherits MailerBase
Public Sub New()
MyBase.New()
Me.CustomMailSender = New CustomMailSender
End Sub
Public Property CustomMailSender As CustomMailSender
Public Sub Sample()
Dim mvcMailMessage As MvcMailMessage = Populate(Sub(i)
i.ViewName = "Sample"
i.To.Add("some1#somewhere.org")
i.Subject = "Boo!"
End Sub)
mvcMailMessage.Send(Me.CustomMailSender)
End Sub
End Class
Yeah, i know that's VB, but i'm a VB guy ! :>
Hope this helps :)