[Scottish] Postfix mail sending error

[Stuart Anderson]

Hay,
  Im having problems sending mail from on my postifx server. 
  I've got a fully working pop-before-smtp installation and its finding the right IP address im connecting with. Ive included a copy of my Postfix main.cf file and a log extract of my connection proccess from start.
  Is there anymore help you can give me?
Stu

------- Log file --------
May 19 18:20:35 quicksilver postfix/smtpd[1287]: connect from 81-6-216-3.dyn.gotadsl.co.uk[81.6.216.3]
May 19 18:20:36 quicksilver postfix/smtpd[1287]: 197C61832E: client=81-6-216-3.dyn.gotadsl.co.uk[81.6.216.3]
May 19 18:20:36 quicksilver postfix/smtpd[1287]: 197C61832E: reject: RCPT from 81-6-216-3.dyn.gotadsl.co.uk[81.6.216.3]: 554 <guttermindpup at hotmail.com>: Relay access denied; from=<stuart at iduniken.com> to=<guttermindpup at hotmail.com> proto=ESMTP helo=<GOTHIX>
May 19 18:20:40 quicksilver postfix/smtpd[1287]: disconnect from 81-6-216-3.dyn.gotadsl.co.uk[81.6.216.3]

------- Postfix Config file --------
# see /usr/share/postfix/main.cf.dist for a commented, fuller
# version of this file.

# Do not change these directory settings - they are critical to Postfix # operation. command_directory = /usr/sbin daemon_directory = /usr/lib/postfix program_directory = /usr/lib/postfix

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) setgid_group = postdrop biff = no

 #       reject_unknown_recipient_domain,
#        reject_non_fqdn_recipient,
#        check_relay_domains

# appending .domain is the MUA's job.
append_dot_mydomain = yes
alias_maps = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = localhost, $myhostname, localhost.$mydomain, $mydomain, unpapillon.com, mdmonline.co.uk, iduniken.com, nx14.com mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + virtual_maps = hash:/etc/postfix/virtual always_bcc = backup mynetworks = 127.0.0.0/8, 212.13.199.189/32 virtual_alias_maps = hash:/etc/postfix/virtual smtpd_client_restrictions = reject_rbl_client relays.ordb.org relay_domains = check_recipient_access hash:/var/lib/pop-before-smtp/hosts, reject_unknown_recipient_domain, reject_non_fqdn_recipient, reject_unauth_destination