Exception reading response; Unrecognized SSL message, plaintext connection?

mail = '[e-mail]'; 
password = 'pwd@123';
setpref('Internet','SMTP_Server','email.company.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','587');

sendmail('[e-mail]','Test from MATLAB','Hello! This is a test from MATLAB!')
sendmail('[e-mail]','Test from MATLAB','Hello! This is a test from MATLAB!')

After Executing the above program ,there is an exception caught:

??? Error using ==> sendmail at 168 Exception reading response; Unrecognized SSL message, plaintext connection?

Please Suggest what changes i need to do for sending email through SSL?

Answer 1

[SuperNano]

Might be a bit of a late answer for you, but I just got through resolving a similar issue. If your company's smtp server is using port 587, it probably means it's using starttls, which is a plain text protocol with an upgrade to TLS. So if we tell matlab to use SSL, it doesn't understand the plain text responses. So need to omit the line props.setProperty('mail.smtp.socketFactory.class','javax.net.ssl.SSLSocketFactory'); or if you've already set it, use props.remove('mail.smtp.socketFactory.class'); to delete the key. Additionally you probably need to enable starttls with props.setProperty('mail.smtp.starttls.enable', 'true' );

This worked for me!

[Richard Fiola]

Thank-you SuperNano! This solved the problem for me as well.

[Mohanad Bahshwan]

You are a hero SuperNano! Fixed my problem!