Postfix无法发送邮件但可以接收邮件

Question

那是我的 /etc/postfix/main.cf:

    # See /usr/share/postfix/main.cf.dist for a commented, more complete version

    smtpd_banner = $myhostname ESMTP
    biff = no
    # appending .domain is the MUA's job.
    append_dot_mydomain = no
    readme_directory = no
    
    # See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
    # fresh installs.
    compatibility_level = 2

    # TLS parameters
    smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
    smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
    smtpd_use_tls=yes
    smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
    smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

    # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
    # information on enabling SSL in the smtp client.

    smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated                                
    defer_unauth_destination
    myhostname = mail.mydomain.tk

    mydomain = mydomain.tk

    alias_maps = hash:/etc/aliases
    alias_database = hash:/etc/aliases

    #myorigin = /etc/mailname
    myorigin = $mydomain

    mydestination = $myhostname, $mydomain, localhost.$mydomain, localhost
    relayhost = 
    mynetworks = 127.0.0.0/8, 192.168.1.0/24
    mailbox_size_limit = 0
    recipient_delimiter = +
    inet_interfaces = all
    #inet_protocols = all
    inet_protocols = ipv4

    home_mailbox = Maildir/

    # SMTP-Auth settings
    smtpd_sasl_type = dovecot
    smtpd_sasl_path = private/auth
    smtpd_sasl_auth_enable = yes
    smtpd_sasl_security_options = noanonymous
    smtpd_sasl_local_domain = $myhostname
    smtpd_recipient_restrictions =      
    permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject

我可以接收邮件但无法发送。我成功连接到服务器并发送邮件没有错误，但我发送邮件的人没有收到收件箱或垃圾邮件。