ah, the server you're using to send emails requires you to use SSL via 
STARTTLS, wich is the gmail smtp server.
with opensmtp i didn't tryed to use starttls, i don't if it supports at all.
check the docs if it supports


  ----- Original Message ----- 
  From: Jyoti Seth 
  To: 'Jorge Bastos' 
  Cc: [EMAIL PROTECTED] 
  Sent: Thursday, April 12, 2007 1:02 PM
  Subject: RE: [Mono-list] Sending Mails through ASP.Net on Mono Linux server


  Thanks for the reply. I changed my asp.net code to use opensmtp instead of 
System.Net.Mail but now its giving another error 

   

  "Smtp error occured: ERROR - Expecting: 250. Recieved: 530 5.7.0 Must issue a 
STARTTLS command first 24sm3331267ugf"

   

  Following is the code that I have used:

   

  OpenSmtp.Mail.MailMessage msg = new OpenSmtp.Mail.MailMessage();

              

              msg.AddRecipient("[EMAIL 
PROTECTED]",OpenSmtp.Mail.AddressType.To);

              msg.From = new OpenSmtp.Mail.EmailAddress("[EMAIL PROTECTED]");

              msg.Subject = "Test mail using .net2.0";

              msg.Body = "This is my msg Body";

   

              string MailServer  = "smtp.gmail.com"; 

              string MailUser   = "[EMAIL PROTECTED]"; 

              string MailPass   = "xxxxx";

              int MailPort =  587;  

   

              OpenSmtp.Mail.SmtpConfig.SmtpPort = 587;

              OpenSmtp.Mail.SmtpConfig.SmtpHost = "smtp.gmail.com";

              OpenSmtp.Mail.Smtp oSmtp = new OpenSmtp.Mail.Smtp 
("smtp.gmail.com",587);//MailServer, MailUser, MailPass, MailPort);

               oSmtp.Username="[EMAIL PROTECTED]";

               oSmtp.Password="xxxxx";

              

               oSmtp.SendMail(msg);

   

  Please let me know where I am going wrong.

   

  Thanks

   

   

  From: Jorge Bastos [mailto:[EMAIL PROTECTED] 
  Sent: Wednesday, April 11, 2007 6:09 PM
  To: Jyoti Seth
  Subject: Re: [Mono-list] Sending Mails through ASP.Net on Mono Linux server

   

  I use opensmtp.net from sf.net, my opinion, its alot better then 
system.net.mail

   

   

    ----- Original Message ----- 

    From: Jyoti Seth 

    To: '[EMAIL PROTECTED]' 

    Sent: Wednesday, April 11, 2007 12:25 PM

    Subject: [Mono-list] Sending Mails through ASP.Net on Mono Linux server

     

    Hello,

     

    I am using System.Net.Mail for sending mails in asp.net applications and it 
is working fine on windows xp m/c. But when I publish this on suse linux server 
with mono 2.0 and postfix smtp service installed and configured it gives an 
error either "Unable to validate data" or "Service not available".

     

    I have also read about sharpwebmail application on net for sending mails 
through ASP.Net on linux. Please suggest what should be best to use to run 
asp.net applications for sending mails on linux server.

     

    Thanks,

    Jyoti


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