[exim] exim4: Connection refused problem for everything

I am trying to setup mail server via gmail

Please help me in resolving this issue.

Mainlog:

2013-11-21 17:18:36 exim 4.76 daemon started: pid=22805, -q30m, listening
for SMTP on [127.0.0.1]:25
2013-11-21 17:18:37 Start queue run: pid=22807
2013-11-21 17:18:37 1VjNv7-0003Cj-FP == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (-53): retry time not reached for any host
2013-11-21 17:18:37 1VjOee-0003f1-J8 == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (-53): retry time not reached for any host
2013-11-21 17:18:37 1VjPwO-0003lQ-L8 == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (-53): retry time not reached for any host
2013-11-21 17:18:37 1VjOeU-0003eu-UU == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (-53): retry time not reached for any host
2013-11-21 17:18:37 1VjOeT-0003ep-Fc == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (-53): retry time not reached for any host
2013-11-21 17:18:37 End queue run: pid=22807
2013-11-21 17:18:40 Start queue run: pid=22820 -qff
2013-11-21 17:18:40 1VjOeT-0003ep-Fc
gmail-smtp-msa.l.google.com[2a00:1450:400c:c05::6c] Network is
unreachable
2013-11-21 17:18:40 1VjOeT-0003ep-Fc
gmail-smtp-msa.l.google.com[173.194.66.108] Connection refused
2013-11-21 17:18:40 1VjOeT-0003ep-Fc
gmail-smtp-msa.l.google.com[173.194.66.109] Connection refused
2013-11-21 17:18:40 1VjOeT-0003ep-Fc == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (111): Connection refused
2013-11-21 17:18:40 1VjOee-0003f1-J8
gmail-smtp-msa.l.google.com[2a00:1450:400c:c05::6c] Network is
unreachable
2013-11-21 17:18:40 1VjOee-0003f1-J8
gmail-smtp-msa.l.google.com[173.194.66.109] Connection refused
2013-11-21 17:18:41 1VjOee-0003f1-J8
gmail-smtp-msa.l.google.com[173.194.66.108] Connection refused
2013-11-21 17:18:41 1VjOee-0003f1-J8 == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (111): Connection refused
2013-11-21 17:18:41 1VjOeU-0003eu-UU
gmail-smtp-msa.l.google.com[2a00:1450:400c:c05::6c] Network is
unreachable
2013-11-21 17:18:41 1VjOeU-0003eu-UU
gmail-smtp-msa.l.google.com[173.194.66.108] Connection refused
2013-11-21 17:18:41 1VjOeU-0003eu-UU
gmail-smtp-msa.l.google.com[173.194.66.109] Connection refused
2013-11-21 17:18:41 1VjOeU-0003eu-UU == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (111): Connection refused
2013-11-21 17:18:41 1VjPwO-0003lQ-L8
gmail-smtp-msa.l.google.com[2a00:1450:400c:c05::6c] Network is
unreachable
2013-11-21 17:18:41 1VjPwO-0003lQ-L8
gmail-smtp-msa.l.google.com[173.194.66.109] Connection refused
2013-11-21 17:18:42 1VjPwO-0003lQ-L8
gmail-smtp-msa.l.google.com[173.194.66.108] Connection refused
2013-11-21 17:18:42 1VjPwO-0003lQ-L8 == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (111): Connection refused
2013-11-21 17:18:42 1VjNv7-0003Cj-FP
gmail-smtp-msa.l.google.com[2a00:1450:400c:c05::6c] Network is
unreachable
2013-11-21 17:18:42 1VjNv7-0003Cj-FP
gmail-smtp-msa.l.google.com[173.194.66.108] Connection refused
2013-11-21 17:18:42 1VjNv7-0003Cj-FP
gmail-smtp-msa.l.google.com[173.194.66.109] Connection refused
2013-11-21 17:18:42 1VjNv7-0003Cj-FP == sneha.nie@??? R=smarthost
T=remote_smtp_smarthost defer (111): Connection refused
2013-11-21 17:18:42 End queue run: pid=22820 -qff

I have ..

sneham@AIVautomation:~$ cat /etc/exim4/update-exim4.conf.conf
# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'
#
# Please note that this is _not_ a dpkg-conffile and that automatic changes
# to this file might happen. The code handling this will honor your local
# changes, so this is usually fine, but will break local schemes that mess
# around with multiple versions of the file.
#
# update-exim4.conf uses this file to determine variable values to generate
# exim configuration macros for the configuration file.
#
# Most settings found in here do have corresponding questions in the
# Debconf configuration, but not all of them.
#
# This is a Debian specific file

dc_eximconfig_configtype='smarthost'
dc_other_hostnames=''
dc_local_interfaces='127.0.0.1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='smtp.gmail.com::587'
CFILEMODE='644'
dc_use_split_config='true'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'
sneham@AIVautomation:~$