[rt-users] Problem with postfix please help me

[wajdi]

I have rt-4.2.12 installed with postfix and fetchmail for outbound and
inbound mail all of there work fine. But the two  last days postfix stop
sending mail .

Notice that postfix was installed with a smtp.gmail.com as a relayhost and
when I send a mail I obtain in /var/log/mail.log"connect to
smtp.gmail.com[]:587 : Connection timed out"

 I don't understand what's the problem 

Please help me

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