validation is failing with a valid hotmail address

[GoogleCodeExporter]

When I try to validate a functional email address (hotmail), validation fails.

on my local apache server (ssl enabled) the validation doesn't fail.
on the remote server (webhosting - where I don't have access to php.ini) the 
validation fails.
What can be wrong?

I attached my validation script.

Thank you.

Note: I am really not sure if this the correct place to post such questions. 
Please let me know.

Original issue reported on code.google.com by [email protected] on 26 Feb 2013 at 12:57

[GoogleCodeExporter]

This is also failing for me on my live server. It tells me a valid email 
address is invalid.

Original comment by [email protected] on 5 Jan 2014 at 12:45

[GoogleCodeExporter]

Maybe this is why it's failing for me too.  What needs to be changed in the 
php.ini file on my remote server?

Original comment by [email protected] on 18 Jan 2014 at 12:51