在过去的一个月里，我试图让我的Mac发送电子邮件。我做了所有事情，但最后当我通过终端发送电子邮件时，我没有在我的Gmail帐户中收到它。也尝试用gmx，但也没有运气。请提出任何提示
postconf -n
biff = no
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin xxgdb $daemon_directory/$process_name $process_id & sleep 5
dovecot_destination_recipient_limit = 1
html_directory = /usr/share/doc/postfix/html
imap_submit_cred_file = –
inet_interfaces = loopback-only
inet_protocols = all
mail_owner = _postfix
mailbox_size_limit = 0
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
message_size_limit = 10485760
mydomain_fallback = localhost
mynetworks = 127.0.0.0/8, [::1]/128
newaliases_path = /usr/bin/newaliases
queue_directory = /private/var/spool/postfix
readme_directory = /usr/share/doc/postfix
recipient_delimiter = +
relayhost = [smtp.gmx.com]:25
sample_directory = /usr/share/doc/postfix/examples
sendmail_path = /usr/sbin/sendmail
setgid_group = _postdrop
smtp_generic_maps = hash:/etc/postfix/generic
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
smtp_tls_loglevel = 1
smtp_tls_security_level = encrypt
smtpd_client_restrictions = permit_mynetworks permit_sasl_authenticated permit
smtpd_tls_ciphers = medium
smtpd_tls_exclude_ciphers = SSLv2, aNULL, ADH, eNULL
tls_random_source = dev:/dev/urandom
unknown_local_recipient_reject_code = 550