Solved

Sending mail with vb.net (VSS2013) using gmail

Posted on 2014-11-12
3
589 Views
Last Modified: 2014-11-12
I am trying to send mail using VB.Net and gmail.
I can get the program to work through my regular email provider, but with gmail it fails

The code is as follows:-

 Try
            MailMessage.From = New MailAddress(EmailSender)
            MailMessage.To.Add(New MailAddress("gordon@grxxx.co.uk"))
            MailMessage.CC.Add(New MailAddress(EmailSender)) ' Copy to the sender
            MailMessage.Subject = "Auto-Email from Comtass SQL Potato Trading System"
            MailMessage.Body = "Haulage Advice for Load Card ABC0123"
            Dim SmtpClient As New SmtpClient()
            SmtpClient.Host = "smtp.gmail.com"
            SmtpClient.Credentials = New Net.NetworkCredential(Username, Password)
            SmtpClient.DeliveryMethod = SmtpDeliveryMethod.Network
            SmtpClient.EnableSsl = True
            SmtpClient.Port = 587
            SmtpClient.Send(MailMessage)
            Label3.Text = "Copy Sent to " & EmailSender
        Catch ex As Exception
            MsgBox("An Error has Occured - " & ex.Message & vbCrLf _
                & " The Email has Not been Succcessful. Please Retry")
        End Try


If I try port 456 the program hangs for a while then comes back with the message "An error has occurred - failure sending mail. The email has not been successful. please re-try"

If I try port 576 it immediately comes back with a  an error  "the SMTP connection requires a secure client or the client was not authenticated "

I'm tearing my hair out!!
0
Comment
Question by:grwallace
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 3

Expert Comment

by:x_bakos
ID: 40437063
Probably will sound funny to you, but do you create an MailMessage object first?

like Dim MailMessage As New MailMessage()

Also, check the settings you have in your gmail account (Settings > Forwarding and POP/IMAP.)
0
 
LVL 3

Accepted Solution

by:
x_bakos earned 500 total points
ID: 40437067
Also, I think that the Username in the

 SmtpClient.Credentials = New Net.NetworkCredential(Username, Password)

line needs to have your complete email address; thus xyz@gmail.com
0
 

Author Closing Comment

by:grwallace
ID: 40437249
Crazy - I was using the client's actual details - they have a separate "send only" address for what we were trying to do. When I tried logging in to it directly it was asking for further verification due to some other details. it worked perfectly on my own Gmail account and will - presumably - work on the customer's account from their ISP/server
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
Introduction When many people think of the WebBrowser (http://msdn.microsoft.com/en-us/library/2te2y1x6%28v=VS.85%29.aspx) control, they immediately think of a control which allows the viewing and navigation of web pages. While this is true, it's a…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question