Mail Zimbar behind F5 have problem port 995

Hi all

 

I had check , the users from internet access mail via outlook with port 995 work fine , Only Users inside access mail port 995 then some time get this errors .

 

My config virtual for traffic outbound :

 

ltm virtual Mail_Server_Port995 {

 

destination 0.0.0.0:pop3s

 

ip-protocol tcp

 

mask any

 

persist {

 

dest_addr {

 

default yes

 

}

 

}

 

pool Default_Gateway_Mail_Server

 

profiles {

 

tcp { }

 

}

 

rules {

 

Source_MailServer

 

}

 

translate-address disabled

 

vlans {

 

Internal

 

}

 

vlans-enabled

 

}

 

the Defaul_Gateway_Mail_Server have 2 member ip public internet

 

the rules Source_MailServer :

 

when CLIENT_ACCEPTED {

 

if { [IP::addr [IP::client_addr] equals 10.0.25.91] } {

 

snatpool Mail_Server

 

}

 

else

 

{

 

snatpool Nat_Internet_live

 

}

 

}

 

the Ip 10.0.25.91 ip address of mail server

 

the snatpool Mail_Server have 2 ip mx record

 

snatpool Nat_Internet_live have 2 ip public internet

 

 

pls help me

 

thanks all