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SMTP Authentication using System.Web.Mail (CDOSYS)

, 12 Dec 2003
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Setting CDOSYS Schema contents to permit "tricks" with System.Web.Mail

Introduction

SMTP Authentication - expensive third party control or roll-you-own with System.Net and sockets? Not required: The CDOSYS Schema is accessible directly from your code and you can use MailMessage.Fields to access and change schema values to control the attributes of your email.

Using the code

Create your email using the MailMessage class - then set the Schema Fields of Interest to you. For example, to send via an external SMTP server on port 25 with SMTP authentication name and password:

// using System.Web.Mail;
    eMail = new MailMessage();
    eMail.BodyFormat = MailFormat.Text;
    eMail.From = _SendFrom;
    eMail.Fields[http://schemas.microsoft.com/cdo/configuration/smtsperver]
      = "SMTPServerName";
    eMail.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpserverport"] = 25;
    eMail.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendusing"]  = 2;
    if (SMTPUser != null && SMTPPassword != null)
    {
        eMail.Fields[
"http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"] = 1;
        eMail.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendusername"] = 
  "SMTPAUTHUser";
        eMail.Fields[
"http://schemas.microsoft.com/cdo/configuration/sendpassword"] = 
  "SMTPAUTHPassword";
    }
    eMail.To = "recipients";
    SmtpMail.SmtpServer = SMTPServerName;
    SmtpMail.Send(eMail);
//

Check MSDN for the CDOSYS and enumerated values.

History

License

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About the Author

C.Shattock

United Kingdom United Kingdom
No Biography provided

Comments and Discussions

 
QuestionHow to send email to a Group PinmemberAJFK1-Oct-09 8:51 
Generalmails are queued in queue directory. Pinmemberrajeshchavan19838-Jul-09 2:51 
QuestionWhat about saved password in Outlook Express ? Pinmemberblackjack200810-Jun-09 2:13 
GeneralSave mail in Sent items PinmemberPardeep Bogra16-Jun-08 3:36 
QuestionBulk Emails: Does anyone know how to send multiple emails inside one connect/disconnect? Pinmemberremoteportal17-Apr-08 4:38 
GeneralError 451? Fix is here! Pinmembermd2k8-Aug-07 2:10 
GeneralIf you are having issues with authentication you want to read this... PinmemberBrotherC31-Jan-07 9:04 
GeneralRe: If you are having issues with authentication you want to read this... Pinmemberhepsy.i25-Oct-07 23:58 
GeneralTo/From Addresses in ASP.NET Email Sending Pinmemberf.z25-Dec-06 9:59 
Generalh PinmemberFarhan Hashmi27-Nov-06 13:08 
GeneralThis Code Does not work.... Help Me out.... Pinmembernilsgate22-Jun-06 0:20 
GeneralRe: This Code Does not work.... Help Me out.... Pinmemberwsdelicate28-Jun-06 7:36 
GeneralRe: SMTP Authentication using System.Web.Mail (CDOSYS) Pinmembermalharone8-Nov-05 6:25 
QuestionDoes anyone know where the cdosys schema has moved? Pinmemberdaniel1122334-Nov-05 7:07 
AnswerRe: Does anyone know where the cdosys schema has moved? Pinmemberjamiranda21-Dec-05 3:34 
Generalthank you!!!! Pinsussansys17-Jun-05 18:43 
Generalthank you Pinmemberfatibomba7-Apr-05 0:47 
GeneralUsing C++ Pinmemberadrianodri10-Dec-04 1:08 
GeneralFantastic! PinmemberJayDreyer23-Sep-04 10:04 
GeneralError No 451 PinsussAnonymous31-Jul-04 22:15 
GeneralExternal SMTP Server with CDOSYS PinsussRameshN330-Jun-04 12:46 
GeneralRe: External SMTP Server with CDOSYS Pinmemberfulgeras13-Jan-05 22:34 
GeneralRe: External SMTP Server with CDOSYS PinsussAnonymous17-Aug-05 0:49 
GeneralRe: External SMTP Server with CDOSYS PinsussAnonymous17-Aug-05 0:53 
QuestionCan't connect? PinsussAdrianFoobar22-Apr-04 0:58 
AnswerRe: Can't connect? PinsussAdrianFoobar22-Apr-04 3:21 
GeneralDifficulties in setting Fields Pinmemberim_tct20-Apr-04 7:58 
GeneralRe: Difficulties in setting Fields PinsussAdrianFoobar22-Apr-04 0:36 
GeneralRe: Difficulties in setting Fields Pinmemberim_tct22-Apr-04 7:35 
GeneralRe: Difficulties in setting Fields PinmemberEntrapnet28-Jan-05 17:04 
GeneralRe: Difficulties in setting Fields Pinmemberxlouk23-Feb-05 20:30 
QuestionHow about a little wrapper? PinmemberJasonSmith23-Mar-04 14:41 
AnswerRe: How about a little wrapper? PinmemberC.Shattock23-Mar-04 17:40 
GeneralNice tip PinmemberCreProDes20-Feb-04 19:28 
GeneralRe: Nice tip Pinmemberspidur124-Feb-04 5:33 
GeneralRe: Nice tip Pinmemberfatihsx27-May-05 9:50 
Generalsmtpserverport Pinmembermattski5-Jan-04 12:58 
GeneralRe: smtpserverport PinmemberC.Shattock5-Jan-04 18:47 

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