send email C# using smtp server with username password authentification -

i have piece of code sends email.. heres code

this not working me. remote smtp service ... , double checked email web access works fine .. can login using gui, recieve , send emails.

but when try through code .. fails message ...

{system.net.mail.smtpexception: smtp server requires secure connection or client not authenticated. server response was: 5.7.0 no auth command has been given.

can advise ... , dont have ews exposed ie.e exchange web service ./.. way go ..

port 25 , no ssl or tls

button b = sender button; try {     mailmessage msg = new mailmessage(senderemail, recieveremail, "afdasfas", "safasfa");     //mailmessage msg = new mailmessage(senderemail, recieveremail, subject, subject);     system.net.mail.smtpclient mailclient = new system.net.mail.smtpclient(emailsmtpserver, outgoingport);     system.net.networkcredential auth = new system.net.networkcredential(senderemail, senderpassword);     mailclient.host = emailsmtpserver;     mailclient.usedefaultcredentials = false;     mailclient.credentials = auth;     mailclient.send(msg);     messagebox.show(b.content + ":worked"); } catch (exception e4) {     messagebox.show(b.content + ": " +e4.message);     messagebox.show(b.content + ": " + e4.stacktrace); } 

c# smtp sendmail smtpclient

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edited apr 28 '10 @ 18:28

asked apr 28 '10 @ 17:29 pskk 1401415