fsockopen returns 'bool(false)' from browser but 'resource(4) of type (stream)' from command line

I cannot send mail in sugarcr开发者_如何学Pythonm. Suagrcrm sends mail with phpmailer using SMTP. I have identified that the error occurs when an attempt to open a socket connection using fsockopen is made. The call to fsockopen returns boolean (false).

The arguments given to fsockopen are 5 variables containing the following values 'mail.example.com'(hostname), 25(port), ''(errno), ''(errstr), 10(timeout)

The error message is

Code: 10107 Reply: A system call that should never fail has failed.

The error code is present in microsoft website under 'Windows Sockets Error Codes' and is partly explained as:

Returned when a provider does not return SUCCESS and does not provide an extended error code. Can indicate a service provider implementation error.

The issue occurs when I call the script from a broswer. If I execute the script from command line, fsockopen returns a resource.

Program Info:

Windows XP

Apache/2.0.63 (Win32) mod_ssl/2.0.63 OpenSSL/0.9.8i PHP/5.2.8 Server

PHP Version => 5.2.8

Can anyone suggest any possible solutions for this issue. Thanks in advance for any suggestion.

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When running under windows, try port 587 instead of 25!

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The error was caused due to the presence of a firewall in the system used as the web server. It worked fine when I uninstalled the firewall.