Failure sending mail. error in asp .net

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Hi,
I have used gmail for sending mail localy which worked fine but when i uploaded the same file on server the "Failure sending mail." error occured.
Here is the code that I have written:

VB

Dim message As New MailMessage
message.From = New MailAddress("xxx@gmail.com")
message.To.Add(New MailAddress("xxx@yahoo.com"))
message.Subject = test mail""
message.Body = "Hi you have got a test mail from me!"
Dim client As New SmtpClient
client.Credentials = New System.Net.NetworkCredential("xxx@gmail.com", "xxxxxxx")
client.Port = 587
client.Host = "smtp.gmail.com"
client.EnableSsl = True
client.Send(message)

Please help me!

Posted 30-Aug-10 19:47pm

Sunil Tarwara

Updated 16-Feb-17 22:01pm

Sandeep Mewara

v3

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Comments

senguptaamlan 31-Aug-10 1:56am

go through the stack trace of the error and if possible post the same here

Sandesh M Patil 31-Aug-10 10:03am

Please write your code in code block

5 solutions

Solution 1

If it works on your local machine and not on the server, then the server cannot access the mail server you're using, for some reason.

Posted 30-Aug-10 20:18pm

Christian Graus

Solution 7

NetworkCredential ncrd = new NetworkCredential();
ncrd.UserName = fromemail;
ncrd.Password = frompwd;
SmtpClient MailClient = new SmtpClient();
MailClient.Host = "smtp.gmail.com";
MailClient.Port = 587;
MailClient.UseDefaultCredentials = true;
MailClient.Credentials = ncrd;
MailClient.EnableSsl = true;
MailClient.DeliveryMethod = SmtpDeliveryMethod.Network;
MailClient.Send(msg);

Posted 16-Nov-15 21:36pm

Member 10841969

Solution 2

Your Network credentials are wrong

Posted 31-Aug-10 4:04am

Sandesh M Patil

Comments

Sandeep Mewara 31-Aug-10 13:43pm

Don't tell me you really expected him to provide right credentials here. :)

Any specific reason why you pointed just the Network credentials?

Sandesh M Patil 1-Sep-10 4:53am

Ok my mistake then, i didn't see such network crendentials till today

Solution 6

if you are working locally it works fine

bt at time of on line

your server like. free hosting sites : somee.com

cant't give permission to acces gmail or smtp server it means it block server to gain access

Posted 5-Oct-15 23:42pm

Member 12036356

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Sandeep Mewara · Accepted Answer · 2010-08-31T07:49:00

Solution 3

It can be because of various reasons. You need to look at them one by one.

Is the port open? Firewall permissions in place?
Further make sure you have configured SMTP configuration in Web.Config:

<system.net>
   <mailSettings>
     <smtp from="abc@somedomain.com">
       <network host="somesmtpserver" port="25" userName="name" password="pass" defaultCredentials="true" />
     </smtp>
   </mailSettings>
</system.net>

If needed, have a look at this Microsoft Video tutorial:
Use ASP.NET to send Email from Website[^]

If needed, there are lots of article on this very site on how to send emails

Posted 31-Aug-10 7:49am

Sandeep Mewara

Comments

[no name] 1-Sep-10 3:59am

Cant i add SMTP configuration in coding page instead of Web.Configuration as i have done like from, host, port, user name, password?

Sandeep Mewara 1-Sep-10 15:22pm

No you cannot. It's a site based setting for sending emails. I don't see an issue why you don't want to do this in config. Infact that would be easy to maintain and lookup.

[no name] 2-Sep-10 3:56am

Ok brother i m much confused now i have put the code in config:
<system.net>
<mailsettings>
<smtp from="xxx@gmail.com">
<network defaultcredentials="true" host="smtp.gmail.com"
="" port="587" username="xxx@gmail.com" password="xxx">

and this is the code for button click on which mail will sent:
Dim message As New MailMessage
message.From = New MailAddress("xxx@gmail.com")
message.To.Add(New MailAddress("xxx@yahoo.com"))
message.Subject = "test mail"
message.Body = "Hi you have got a mail"
Dim client As New SmtpClient
client.Credentials = New System.Net.NetworkCredential("xxx@gmail.com", "xxx")
client.Port = 587
client.Host = "smtp.gmail.com"
client.EnableSsl = True
client.Send(message)
Its working on localhost but not on server! Now please do tell me what and where to edit?

[no name] 2-Sep-10 6:12am

I got the sol just changed port number. Thank you all especially Sandeep bro