Try this
mail = 'sender@mail.com';
Tomail = 'to@mail.com';
password = 'password';
port='587';
setpref('Internet','SMTP_Server','smtp-mail.outlook.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'); If this was previously enabled disable with line below
%props.remove('mail.smtp.socketFactory.class');
props.setProperty('mail.smtp.socketFactory.port',port);
props.setProperty('mail.smtp.starttls.enable', 'true' );
sendmail(Tomail,'Test from MATLAB','Hello! This is a test from MATLAB!')
