Exception thrown Sending E-Mail Messsages Chapter 9

Onypips · April 7th, 2015, 08:00 PM

In the book "Beginning ASP.Net 4.5.1 "by Imar - In the "Try-It-Out" Sending E-Mail Messages on p. 324 in Chapter 9 in Step 5 when I request Email.aspx in the browser I get the following exception:

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The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 Authentication required

Email.aspx.vb
Line 16: mySMTPClient.Send(myMessage)------

I entered the proper information in the web.config file to send an email from my Yahoo account to my Outlook account. I included enableSsl="true" port="587" in the <network> tag. I tried removing the enableSSl and port tag - same exception. I tried sending from Outlook to Yahoo and got a slightly different exception thrown:

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Mailbox unavailable. The server response was: 5.1.0 Authentication required

Email.aspx.vb
Line 16: mySMTPClient.Send(myMessage)
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Any thoughts?
Thanks!

mmorgan30 · April 19th, 2015, 01:27 AM

its asking for authentication so supply the call with credentials. if your logging into your yahoo account to send an email from your yahoo to an outlook account, supply your yahoo creds and vice versa.