SMTP host issue with sendmail() in MATLAB r2013a

Hi all,

While attempting to send email to other accounts than Yahoo and Gmail, it aborts as I experience an authentification issue. Does anyone know a specific reason and a way around to overcome this matter?

Error using sendmail (line 172)
Could not connect to SMTP host: mail.xxxx.com, port: 25;
Connection timed out: connect

end

see below the code:

 clc
% Define these variables appropriately:
mail = '[e-mail]'; %my email address
recipient='[e-mail]';
server='mail.xxxx.com';   % <> from 'smtp.mail.xxxx.com' that is not recognised at all
posdat=char(inputdlg('Enter date (yyyymmdd):'));
fid='C:\local\';
file1='\out';
file2='\dist.pdf';
attach1=cellstr(strcat(fid,posdat,file1));
attach2=cellstr(strcat(fid,posdat,file2));
attach = [attach1 attach2];
%smtp.mail.yahoo.com = Yahoo Server
%smtp.gmail.com= Gmail Server
password = 'xxxx';  %my pass
setpref('Internet','SMTP_Server',server);
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','25'); % <> from port '465'
% Send the email.  Note that the first input is the address you are sending the email to
sendmail(recipient,'TEST','test files are attached,',attach)

I hoped the post found on NET.addAssembly could have helped as I've also tried:

clc
user='[e-mail]';
pass='xxx';
recipient='[e-mail]';
NET.addAssembly('System.Net')
import System.Net.Mail.*;  
mySmtpClient = SmtpClient('mail.xxx.com');
mySmtpClient.UseDefaultCredentials = false;
mySmtpClient.Credentials = System.Net.NetworkCredential(user, pass);
from = MailAddress(user);
to = MailAddress(recipient);
myMail = MailMessage(from, to);
myMail.Subject = ['Test message: ' datestr(now)];
myMail.SubjectEncoding = System.Text.Encoding.UTF8;
myMail.Body = '<b>Test Mail</b><br>using <b>HTML</b>';
myMail.BodyEncoding = System.Text.Encoding.UTF8;
myMail.IsBodyHtml = true;
mySmtpClient.Send(myMail)

which ends up with:

Message: Failure sending mail.
Source: System
HelpLink:

Thus, any relevant feedback would be much appreciated. Best,