smtp hosted error

[brettokumar]

hi iam using code like below

System.Web.Mail.MailMessage mm = new System.Web.Mail.MailMessage();
 
                  mm.From = "[e-mail]";
 
                  mm.To = txt_email.Text;
                  mm.Subject = "Conformation your Activation Account";
                  mm.BodyEncoding = System.Text.Encoding.UTF8;
                  mm.Body = cont;
                  mm.BodyFormat = System.Web.Mail.MailFormat.Html;
                  SmtpMail.SmtpServer = "mail.aciin.com";
              SmtpMail.Send(mm);

this above code is working from my local system.
but aftermy site is hosted it will display error

please help me

[DrBunchman]

Hi brettokumar,

What's the error that you are receiving?

Dr B

[brettokumar]

hi my error is

Runtime Error
Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".

<!-- Web.Config Configuration File -->

<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>


Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customErrors> configuration tag to point to a custom error page URL.

<!-- Web.Config Configuration File -->

<configuration>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
</system.web>
</configuration>

[DrBunchman]

Can you change the CustomErrors tag in your Web.Config file so the mode property is set to "Off" as described above. Doing this will prevent the generic message above from displaying and give you the details of the actual exception that was thrown.

Thanks,

Dr B

[brettokumar]

hi now i m gettin error likd this
System.Runtime.InteropServices.COMException: The transport failed to connect to the server.

in this line SmtpMail.Send(mm);

[Plater]

1) System.Web.Mail is depreciated (unless yo uare still using .NET1.1) and you should be using System.Net.Mail

2) You are not actually defining the mail server you are trying to connect to, which means it will try to use the default. Which is either localhost or a default one supplied in your web.config. Which probably means there IS no localhost smtp server running on that system. Specify which smtp server you want to send mail through and try that?

[brettokumar]

now i am getting error was
The server response was: 553

[Plater]

now i am getting error was
The server response was: 553

553 - The command was aborted because the mailbox name is invalid.
You will need to use valid email addresses

[DrBunchman]

This could be caused by a number of issues, try the following and see if you have any success.

Is the mail server name being resolved properly by the DNS? Try using the IP address if you are not sure.

Have you got any firewalls or proxy servers that might be preventing you from connecting to the mail server? I've had problems with certain McAfee settings blocking mail before.

Have you got the default smtp server installed on your deployment machine? If so try sending mail via that (Set the SmtpServer property to "127.0.0.1") and see if that works.

Let me know how you get on,

Dr B

EDIT: Too slow! Must have taken ages writing this post...:-)