Good day colleagues,

I have installed postfix 2.6 on my centos and trying to sent emails through a smarthost, to which I can telnet on smtp port, and failing with subject error.

My main.cf is as follows:

queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
myhostname = mail.mydomain.net
mydomain = mydomain.net
inet_interfaces = localhost
inet_protocols = all
mydestination = $myhostname, localhost.$mydomain, localhost
unknown_local_recipient_reject_code = 550
mynetworks = 192.168.1.0/24, 127.0.0.0/8
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 3
debug_peer_list = smarthost.relay.com
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.6.6/samples
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
transport_maps = hash:/etc/postfix/transport

/etc/postfix/transport contains:

mydomain.net :
* smtp:[smarthost.relay.com]:465

I then try:
echo "test email body" | mail -s "Test Email Subject" test@yahoo.co.uk

To which I get:

5E388A15AF: to=<test@yahoo.co.uk>, relay=smarthost.relay.com[ipaddress]:465, delay=710, delays=545/0.03/165/0, dsn=4.4.2, status=deferred (lost connection with smarthost.relay.com[ipaddress] while receiving the initial server greeting)

Any help would be much appreciated,

Many thanks,
Archie