我已将 example.com 配置为使用中继 mailjet.com 以及与之关联的电子邮件，例如[电子邮件保护]想要这个[电子邮件保护]使用另一个中继，即 smtp-int.xyz.com，它基本上在公司内部路由。发送到 @xyz.com 的任何内容都通过 smtp-int.xyz.com 路由。这可能吗？我尝试添加条目[电子邮件保护]在 /etc/postfix/senders_relay 中并重新加载 postfix 但没有帮助....我也尝试在 /etc/postfix/transport 中添加它，但这也没有帮助....可能是我做错了什么....
/etc/postfix/sender_relay
@example.com in-v3.mailjet.com
/etc/postfix/transport
xyz.com smtp:smtp-int.xyz.com
example.com smtp:in-v3.mailjet.com
/etc/postfix/main.cf
sender_dependent_relayhost_maps = hash:/etc/postfix/sender_relay
smtp_sender_dependent_authentication = yes
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
compatibility_level = 2
header_checks = regexp:/etc/postfix/header_checks
inet_interfaces = all
inet_protocols = all
mailbox_size_limit = 0
mydestination = $myhostname, mca-xyz.com, localhost
myhostname = mca-xyz.com
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
sender_dependent_relayhost_maps = hash:/etc/postfix/sender_relay
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password
smtp_sasl_security_options = noanonymous
smtp_sender_dependent_authentication = yes
smtp_tls_CApath = /etc/ssl/certs
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_sender_restrictions = check_sender_access regexp:/etc/postfix/allowed_senders
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_security_level = may
transport_maps = regexp:/etc/postfix/discard
一些日志：11 月 16 日 05:06:27 mca-xyz.com postfix/cleanup[557307]: 7FB925F925: 警告：标题主题：Wildfly AS DOPS (mca04.xyz.com) 从 mca04.xyz.com[xxx.xx.xx.xxx] 重新启动 OK；[电子邮件保护] [电子邮件保护]proto=SMTP helo=<mca04.xyz.com> 11 月 16 日 05:06:27 mca-xyz.com postfix/smtp[557560]: 7FB925F925:[电子邮件保护]，中继=in.mailjet.com[xxx.xxx.xx.xx]:25，延迟=0.26，延迟=0.01/0/0.17/0.08，dsn=2.0.0，状态=已发送（250 OK 排队为 5bd486ec-8825-4d16-ad5f-71f18603b431）