VB .Net使用Gmail帐户发送电子邮件 [英] VB .Net Sending email using Gmail account

问题描述

为什么超时？

  Dim s As New SmtpClient 
 s.Host =smtp.gmail。 com
 s.Port = 465 
 s.EnableSsl = True 
 s.Timeout = 5000 
 s.Credentials =新建NetworkCredential（[e-mail]， mypassword）
 
 Dim m As New MailMessage 
 m.To.Add（[e-mail]）
 m.From = New MailAddress（my .name @ gmail.com）
 m.Body =Test Message
 m.Subject =Test Subject
 s.Send（m）
  
 
 
这些设置直接来自我的Outlook Express测试设置，并且可以正常发送。
 
 
 
设置很长的超时时间=不做任何事情
 
 
 
更改端口号为587或25 =不做任何事情
 
 
 
一个想法：Outlook Express有一个我的服务器需要身份验证选项，我没有看到与SmtpClient明显的等价物。它可能与此有关吗？
 
 
 
预先感谢 
 
 
 Dave 
 
 
 
  -  Fedind上的Trindaz＃vb.net-smtp 
解决方案
编辑：您可能需要添加以下行： s.UseDefaultCredentials = False 在以 s.Credentials ... 开头的行之前
 
 
 
您是否有防火墙或运行某种反病毒程序可能会阻止连接？
 
 
 
  
 
 
  telnet smtp.gmail.com 465 
 
开始只是从命令行执行简单连接。 code> 
请注意，根据Windows版本，您可能必须先启用telnet客户端，请参阅 link 获取详细信息。
 
Why does this timeout?
Dim s As New SmtpClient
s.Host = "smtp.gmail.com"
s.Port = 465
s.EnableSsl = True
s.Timeout = 5000
s.Credentials = New NetworkCredential("[e-mail]", "mypassword")

Dim m As New MailMessage
m.To.Add("[e-mail]")
m.From = New MailAddress("[e-mail]")
m.Body = "Test Message"
m.Subject = "Test Subject"
s.Send(m)
These settings come straight from my Outlook Express test setup, and it can send fine.

Set really long timeout = does nothing

Change port numbers to 587 or 25 = does nothing

One thought: Outlook Express has a "My server requires authentication" option, which I couldn't see an obvious equivalent for with SmtpClient. Could it be related to that?

Thanks in advance

Dave

--Trindaz on Fedang #vb.net-smtp
解决方案
Edit: You might need to add the following line: s.UseDefaultCredentials = False before the line starting with s.Credentials...

Do you have a firewall or some kind of anti-virus program running that might be blocking the connections?

A good place to start is to just do a simple connect from the command line.
telnet smtp.gmail.com 465
Note, depending on Windows version you might have to enable the telnet client first, see this link for details.

                        
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