Ubuntu 24.04 LTS下Postfix配置错误及465端口未监听问题求助

大家好，我现在在Ubuntu 24.04 LTS环境下配置Postfix遇到了问题，想请各位大佬帮忙排查：

• 我已经反复确认过证书和密钥文件是正确的
• 465端口始终没有显示处于监听状态，但对应的防火墙规则已经配置好了

下面是我的main.cf配置内容：

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

Debian specific: Specifying a file name will cause the first #

line of that file to be used as the name. The Debian default #

is /etc/mailname. #

#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

appending .domain is the MUA's job. #

append_dot_mydomain = no

Uncomment the next line to generate "delayed mail" warnings #

#delay_warning_time = 4h

readme_directory = no

See http://www.postfix.org/COMPATIBILITY_README.html -- default to 3.6 on #

fresh installs. #

compatibility_level = 3.6

TLS parameters #

smtpd_tls_cert_file = /etc/ssl/certs/mailserver.crt
smtpd_tls_key_file = /etc/ssl/private/mailserver.key
smtpd_tls_security_level = may
smtpd_tls_auth_only = yes
smtp_tls_security_level = may

smtp_tls_CApath = /e... #

有没有大佬能帮我看看问题出在哪？为什么465端口一直没监听呢？

备注：内容来源于stack exchange，提问作者Kwilzz