Email from application not working

We have two limited networks connected through a router r1.  One network is in the 10.100.1.0/24 and is also connected to the outside through an asa5505. Our networks are not registered in the internet. However, i am able to send emails from this network using smtp.gmail.com smtp server.

We have another network 192.168.0.0/24 conected to the 10.100.1.0/24 network through router r1. From this network we have a server 192.168.0.5 to send event emails. When i go to this server, from the cmd I am able to ping the smtp.gmail.com server but i can't send emails. I get a message that says unable to contact server
ShenAsked:
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ajeabCommented:
check r1 route. it may block port 25.
try tracert to smtp.google.com and see what path it took.  (should it 10.100.1.1 then  then asa then internet)
then try "telnet smtp.google.com 25"  and see what happen.
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ShenAuthor Commented:
On the router r1 command line  i can't  ping smtp.gmail.com , but i can ping 74.125.196.108 (smtp.gmail.com)
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ShenAuthor Commented:
i just added it dns dmain lookup and the dns router ip to the R1. I am able to tracert and ping smtp.gmail.com from the router. But I still can't still make the pc 192.168.0.5 application work.
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ajeabCommented:
try the same ping and tracert from the PC.  make sure you have gateway correct on the PC.
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