C# and SMTP

[Jay]

I'm using a C# console program to connect to my smtp server and send a
simple email message to show my class. Does anyone know why some email
servers do not accept the message that I'm trying to send?

I just have the basics in the message:

To Receipients
From address
Subject
Body

Do I have to populate any other part of the message object to allow other
servers to accept my message?

[Marina]

Some servers require authentication to send emails. Perhaps that is the
problem. The .NET email components don't provide a way to specify this,
however.

"Jay" <[e-mail]> wrote in message news:xXtNc.31629$9I.24548@okepread02...

I'm using a C# console program to connect to my smtp server and send a
simple email message to show my class. Does anyone know why some email
servers do not accept the message that I'm trying to send?

I just have the basics in the message:

To Receipients
From address
Subject
Body

Do I have to populate any other part of the message object to allow other
servers to accept my message?

[Mike Newton]

Marina wrote:

Some servers require authentication to send emails. Perhaps that is the
problem. The .NET email components don't provide a way to specify this,
however.

"Jay" <[e-mail]> wrote in message news:xXtNc.31629$9I.24548@okepread02...

I'm using a C# console program to connect to my smtp server and send a
simple email message to show my class. Does anyone know why some email
servers do not accept the message that I'm trying to send?

I just have the basics in the message:

To Receipients
From address
Subject
Body

Do I have to populate any other part of the message object to allow other
servers to accept my message?

You can find some SMTP mailer classes out there that do authentication...

Check out the slow-as-molasses site:
http://www.codeproject.com/csharp/smtpauthlogin.asp
http://www.codeproject.com/dotnet/SM...entication.asp

They open sockets directly to the SMTP server, completely ignoring
CDONTS and CDO (which is preferable).

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

You should no send the email directly to the recipient server, you instead
should use yours, several ISP ( mine does ) restrict the connections to
SMTP, other server are starting to implement a security measure ( don't
remember the correct name now) that before accept an email coming from
po**@hotmail.com check with the DNS of hotmail.com which are the servers
that can send email with it domain, if your machine is not you cannot send
it.

Also as Marina suggested a lot of servers requires auth before accepting
email

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Jay" <[e-mail]> wrote in message news:xXtNc.31629$9I.24548@okepread02...

I'm using a C# console program to connect to my smtp server and send a
simple email message to show my class. Does anyone know why some email
servers do not accept the message that I'm trying to send?

I just have the basics in the message:

To Receipients
From address
Subject
Body

Do I have to populate any other part of the message object to allow other
servers to accept my message?