sir i deployed squid proxy to run my window envirement
but my clients are unable to send and recieve mails from outlook they found an error
task 'mail.daedalussoftware.com -receiving' reported error (0x800CCOF):The connection to the server wwas interrupted.if this problem continues, contact your server admin .
sir i applied rules from iptables but this error still exists i can send you my iptalbles rules
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere tcp dpt

op3
ACCEPT tcp -- anywhere anywhere tcp dpt:smtp
ACCEPT udp -- anywhere anywhere udp dpt:smtp
ACCEPT udp -- anywhere anywhere udp dpt

op3
Chain FORWARD (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- 192.168.3.0/24 mail.hostdepot.net tcp dpt

op3
ACCEPT tcp -- 192.168.3.0/24 mail.hostdepot.net tcp dpt:smtp
ACCEPT udp -- 192.168.3.0/24 mail.hostdepot.net udp dpt:smtp
ACCEPT udp -- 192.168.3.0/24 mail.hostdepot.net udp dpt

op3
ACCEPT all -- anywhere anywhere