SMTP Mail not working from client pc

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I have a windows application that sends an SMTP email. It works fine from my pc but it does not from another. The code I'm using is:

string body = "my message" + txtFriendName.Text + Environment.NewLine +
      Environment.NewLine + " my url link - " + "http://www.mywebsite.com";
MailMessage email = new MailMessage("sender email", txtFriendEmail.Text, txtName.Text + "subject", body);

SmtpClient SmtpMail = new SmtpClient("smtp.fasthosts.co.uk", 25);
SmtpMail.Credentials = new NetworkCredential("sender email", "password");
SmtpMail.EnableSsl = false;
SmtpMail.Send(email);

Any ideas why it does not work from any pc?

Posted 10-Feb-11 12:14pm

milenalukic

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Comments

Albin Abel 10-Feb-11 18:16pm

Have you tried without the credentials

2 solutions

Solution 1

What is not working? put your code in try/catch block and see what is throwing exception. That might give you a hint. If not update your question with relevant information.

Posted 10-Feb-11 13:04pm

Yusuf

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Nish Nishant · Accepted Answer · 2011-02-10T13:04:00

Solution 2

The client machine may have a firewall that blocks outgoing SMTP, or the firewall may be on his network gateway/router. In some cases, specially with home connections, ISPs do not permit outgoing SMTP either (I have had this problem with Comcast in the US and Rogers in Canada).

Posted 10-Feb-11 13:04pm

Nish Nishant

Updated 10-Feb-11 13:05pm

v2

Comments

milenalukic 10-Feb-11 19:10pm

I will check, but this is probably the problem. Is there a workaround to bypass the block?

Nish Nishant 10-Feb-11 19:11pm

No, you are going to have to ask them to configure the firewall to allow outgoing connections on port 25.

milenalukic 14-Feb-11 16:12pm

Thanks very much.

I have now configured the program to send mail from the server side and it works perfectly.

Nish Nishant 14-Feb-11 16:15pm

You are welcome. Glad to hear it's all working fine now.