Send Approval SMTP Error - The Operation has timed out

Hi All,

I'm trying to use Send Approval Request by email. Here is my SMTP Mail Setup :

SMTP Server : smtp.gmail.com
SMTP Server Port : 465
Authentication : Anonymous/ NTLM/ Basic (I've tried it all)
User ID(Basic) : SomebodyThatIUsedToKnow@gmail.com
Password(Basic) : xxxxxxxxxxxxx
Security Connection : TRUE

But when i push the Send Approval Request Button, it took couple minutes and gave me this error :

Microsoft Dynamics NAV

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The SMTP mail system returned the following error: "The operation has timed out.".

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OK

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I also have turn my firewall off. Is there any setting that i may have missed?

Thanks in advance.