Problem with :: Error using sendmail (line 171) Authentication failed.-- Please Help me

Hello Please I need your Help:

I tried to start this code

mail = '[e-mail]';
password = 'passwordgoeshere';
setpref('Internet','SMTP_Server','smtp.server.com');
setpref('Internet','E_mail',mail);
setpref('Internet','SMTP_Username',mail);
setpref('Internet','SMTP_Password',password);
props = java.lang.System.getProperties;
props.setProperty('mail.smtp.auth','true');
props.setProperty('mail.smtp.socketFactory.class', 'javax.net.ssl.SSLSocketFactory');
props.setProperty('mail.smtp.socketFactory.port',port);
sendmail(mail,'Test from MATLAB','Hello! This is a test from MATLAB!')

I have this Problem Error using sendmail (line 171) Authentication failed.

I know the Problem with the Web- Preferences of Matlab i tried with Proxy host 172.16.10.8 and Port 22 it is not Success...

Please How i can find right Proxy host and Proxy Port ??

Thank you

[Jan]

Hm. I've answered this question already some minutes ago. If you post a question in different forums, please add a link to the other thread, such that the readers do not waste the time to post answers, which have been given before already.

Please use the "{} Code" button to format your code.

Answer 1

[Jan]

Just to be sure: Did you adjust these lines accordingly:

mail = '[e-mail]';
password = 'passwordgoeshere'

?!

The right Proxy host and Proxy Port are provided by your Email service and the forum cannot guess this.

Answer 2

[Majd Dw]

Hello Jan,

I use gmail Server so the port is 465 and the proxy host is smtp.gmail.com I have the same Problem Error using sendmail (line 171) Authentication failed.

Answer 3

[Majd Dw]

Jan i wi

ll show you in this Dialog. we have to put the proxy and the port

[Samuel Bland]

I had been using sendmail() since forever and it worked fine. I had to change the email address and then I got the authentication failed error message. The answer by Majd Dw solved this problem for me. Also, make sure to go to your gmail privacy settings and allow less secure access if necessary.

[Bradley Stiritz]

sendmail() was also working fine for me, and then suddenly stopped working. Now I always get "authentication failed".

I tried setting the Matlab Web Preferences per Majd Dw above. (Previously all the values were blank) In my case, clicking the "Test Connection" button generated the message "Failed!"

I'm not sure where to go from here? I have already done the following in Gmail Settings--

• Made sure "2-Step Verification" is off
• Made sure "Less Secure App Access" is on
• Enabled POP and IMAP

Does anyone have any further thoughts, please?

[Shae Morgan]

Even if you enable less secure apps, it'll fail the authentication if the account is viewed as suspicious activity. I'm not sure how to get around it yet, but I'm dealing with the same issue

[Vitor Higuti]

In my case, I was running the script with sendmail on remote pc. After I logged in gmail account via browser (it asked to provide the security code), I did not get the authentication error anymore and the email with sendmail went through.

[Walter Roberson]

For gmail specifically, you need to enable "Less secure app access" on gmail; https://support.google.com/accounts/answer/6010255?hl=en