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ERROR:The transport failed to connect to the server


Posted Date: 29 May 2008    Resource Type: Errors and Solutions    Category: General
Author: Kumar VeluMember Level: Diamond    
Rating: Points: 5



Why do I get the error message "The transport failed to connect to the server "?
Solution:
This is a network related error. Your application cannot connect to the mail server specified.
Make sure that the following are true about SmtpMail.SmtpServer:
Is a valid SMTP Server
Make sure that the server System.Web.Mail is running or can connect to the mail server. Some times firewalls or proxy servers can get in the way.
Try specifying the value by IP address. Poor DNS resolution can sometimes hinder name lookups.
Make sure that the mail server is running at port 25.
If you did not specify a SmtpMail.SmtpServer property, or if SmtpMail.SmtpServer points to "localhost" (or the equivalent), be sure the SMTP Service is running on port 25.
For testing purposes change the MailMessage.From and MailMessage.To properties to an address that exists on SmtpMail.SmtpServer. Some times this exception is thrown, when it really is a relay issue.




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