SMTP sending e-mail

[John J. Hughes II]

I have an application that sends simple e-mails using SMTP, it no longer
works with a lot of e-mail servers.

Basically the problem seems to be that I am no longer sending a valid logon
sequence. The server says the user is not authorized, if I switch to
Outlook it works.

Code to send authorizion.

this.SendData("AUTH LOGIN" + CRLF);
string user =
Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(this.User));
this.SendData(user + CRLF);
string pw =
Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(this.Password));
result = this.SendData(pw + CRLF);
if(result.StartsWith("235"))
break;

This is what outlook is doing per the log file:

[tx] AUTH NTLM
<rx> 334 NTLM supported
[tx] TlRM.....


Any one know how to send NTLM type logon or another methed to work around
this problem?

Regards,
John

 

[Patrice]

http://curl.netmirror.org/rfc/ntlm.html looks like a good starting point.

Any reason for not using the System.Web.Mail class that is part of the .NET
framework ? The fields property (with 1.1) allows to define how you'll
access to the SMTP server :
http://www.codeproject.com/dotnet/SystemWeb_Mail_SMTP_AUTH.asp

Patrice

 

[John J. Hughes II]

Patrice,

Thanks for the lead...

I would perfer to use the System.Web.Mail and that is what I used in the
first place. I recall running into a problem if IIS was not installed since
it use that or something.

Oh well I have tried again and am getting this error, any suggestion?

Error:Could not access 'CDO.Message' object.
Inner:Exception has been thrown by the target of an invocation.
Stack: at System.Web.Mail.LateBoundAccessHelper.CallMethod(Object obj,
String methodName, Object[] args)
at System.Web.Mail.CdoSysHelper.Send(MailMessage message)
at System.Web.Mail.SmtpMail.Send(MailMessage message)
at RAMSComThrd.sendAlarm..ctor(String ac, String num, String data) in
c:\documents and settings\all users\documents\shared
vsp\work\ramscomthrd\sendalarm.cs:line 70
at MailTest.Form1.btnTest_Click(Object sender, EventArgs e) in
c:\documents and settings\john @ work\my documents\visual studio
projects\mailtest\form1.cs:line 494

Regards,
John

 

[Patrice]

Yes, you need to install the SMTP service first (IMO this service doesn't
require IIS itself).

Patrice

 

[John J. Hughes II]

Patrice,


Thanks.

Regards,
John

 

[Supra]

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