Using gmail address to send out emails with Postal

Question

I'm trying to send out an email from my Gmail account using Postal:

dynamic email = new Email("Appointment");
email.To = "sergiotapia@outlook.com";
email.Send();

And I get this error:

System.Net.Mail.SmtpException: {"The SMTP server requires a secure connection or the client was not authenticated.The server response was: 5.7.0 Must issue a STARTTLS command first.

Any ideas what I need to do to send this email out?

Here's my web.config setting:

<system.net>
    <mailSettings>
        <smtp deliveryMethod="Network" from="asdf@adsf.ly.com">
        <network host="smtp.gmail.com" port="587" defaultCredentials="false" userName="asdf@adsf.ly" password="asdf" />
        </smtp>
    </mailSettings>
</system.net>

I'm hoping the u/p information you entered is fake. If not, you should change your password, now. — Andrew Barber, Dec 20 '12 at 14:24
Change `dynamic` to `var` - you will get compile-time checks for your code. — Jakub Konecki, Dec 20 '12 at 14:24
@JakubKonecki I believe the `dynamic` thing is because of Postal; that's what it returns. — Andrew Barber, Dec 20 '12 at 14:25
@JakubKonecki: No; `Email` is a `DynamicObject`. https://github.com/andrewdavey/postal/blob/master/src/Postal/Email.cs — SLaks, Dec 20 '12 at 14:25
@AndrewBarber: Late nights and stale coffee strikes again. Thanks for the heads up. Hopefully a mod can remove that part from the question history. — sergserg, Dec 20 '12 at 14:31
@Serg Even if they do (you can flag it for removal from the edit history), you would be surprised how quickly Google indexes/caches Stack Overflow pages; you definitely need to change the info *now*. :) Go ahead... I'll wait... OK, great! — Andrew Barber, Dec 20 '12 at 14:34
@JakubKonecki Nope; `Email` is a `Postal` class. The built-in .NET email class is `MailMessage` — Andrew Barber, Dec 20 '12 at 14:36

score 10 · Accepted Answer · answered Dec 20 '12 at 14:24

10

As the error clearly states, Gmail only accepts SSL connections.

Add enableSsl="true" to your config.

answered Dec 20 '12 at 14:24

SLaks

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Clarification: I needed to add it to the `` tag. See: `` - Thanks for your help! – sergserg Dec 20 '12 at 14:36

score 1 · Answer 2 · edited Dec 20 '12 at 14:37

1

You should use secure connection when you try to sending an mail. Try this in your config;

enableSsl="true"

Problems sending mail

edited Dec 20 '12 at 14:37

Andrew Barber

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answered Dec 20 '12 at 14:25

Soner Gönül

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Nitpick: He's _sending_ mail, not retrieving. – SLaks Dec 20 '12 at 14:31

Fathur · Answer 3 · 2014-09-09T02:34:41.130

I got the same problem. but now fixed by using this config

<system.net>
    <mailSettings>
      <smtp deliveryMethod="Network" from="dotnet1235@gmail.com">
        <network host="smtp.gmail.com" port="587"
                 defaultCredentials="false"
                 userName="dotnet1235@gmail.com"
                 password="bla_bla"
                 enableSsl="true"/>
      </smtp>
    </mailSettings>
  </system.net>

I follow the step on this blog http://fat-night.blogspot.com/2014/09/c-postal-mvc-5-menggunakan-gmail-mail.html

Using gmail address to send out emails with Postal

3 Answers3