Postfix - 530-5.5.1 Authentication Required

Question

I'm trying to get postfix to deliver mail to gmail. I've followed this article on configuring it, but I still gives me an error:

relay=smtp.gmail.com[173.194.66.108]:587, delay=0.46, delays=0.05/0/0.37/0.04,
dsn=5.5.1, status=bounced (host smtp.gmail.com[173.194.66.108] said: 530-5.5.1 
Authentication Required.

http://mhawthorne.net/posts/postfix-configuring-gmail-as-relay.html

What am I missing?

Here's my postfix config:

alias_maps = hash:/etc/aliases
biff = no
canonical_maps = hash:/etc/postfix/canonical
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter =
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
debug_peer_level = 3
debug_peer_list = smtp.gmail.com
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin $daemon_directory/$process_name $process_id & sleep 5
defer_transports =
delay_warning_time = 1h
disable_dns_lookups = no
disable_mime_output_conversion = no
html_directory = /usr/share/doc/packages/postfix-doc/html
inet_interfaces = localhost
inet_protocols = all
mail_owner = postfix
mail_spool_directory = /var/mail
mailbox_command =
mailbox_size_limit = 0
mailbox_transport =
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains =
masquerade_exceptions = root
message_size_limit = 0
message_strip_characters = \0
mydestination = $myhostname, localhost.$mydomain
myhostname = suse.home
mynetworks_style = subnet
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/packages/postfix-doc/README_FILES
relay_clientcerts =
relayhost = [smtp.gmail.com]:587
relocated_maps = hash:/etc/postfix/relocated
sample_directory = /usr/share/doc/packages/postfix-doc/samples
sender_canonical_maps = hash:/etc/postfix/sender_canonical
sendmail_path = /usr/sbin/sendmail
setgid_group = maildrop
smtp_enforce_tls = no
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_CAfile =
smtp_tls_CApath = /etc/postfix/ssl/cacerts
smtp_tls_cert_file =
smtp_tls_key_file =
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtpd_tls_session_cache
smtp_use_tls = yes
smtpd_client_restrictions =
smtpd_helo_required = no
smtpd_helo_restrictions =
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sender_restrictions = hash:/etc/postfix/access
smtpd_tls_CAfile =
smtpd_tls_CApath =
smtpd_tls_ask_ccert = no
smtpd_tls_cert_file =
smtpd_tls_key_file =
smtpd_tls_received_header = no
smtpd_use_tls = no
strict_8bitmime = no
strict_rfc821_envelopes = no
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550
virtual_alias_domains = hash:/etc/postfix/virtual
virtual_alias_maps = hash:/etc/postfix/virtual

Answer 1

You most likely need to go to Google's unlock page, as the new IP address trying to send the mail is raising security concerns.

Once you have unlocked via the browser, the script will be able to send.