我正在尝试将 DKIM 添加到我的域中，我创建了一个密钥，将以下内容添加到/etc/exim4/conf.d/transport/30_exim4_config_remote_smtp：
dkim_domain = mydomain.com
dkim_selector = mail1
dkim_private_key = /etc/exim4/dkim.key
重新启动exim服务，尝试过dpkg-reconfigure，但所有电子邮件都未经签名发送。/var/log/exim4/panic.log是空的。没有错误或任何东西。
我究竟做错了什么？Ubuntu 10.04 LTS
### transport/30_exim4-config_remote_smtp
#################################
# This transport is used for delivering messages over SMTP connections.
remote_smtp:
debug_print = "T: remote_smtp for $local_part@$domain"
driver = smtp
.ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
.endif
.ifdef REMOTE_SMTP_HEADERS_REWRITE
headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
.endif
.ifdef REMOTE_SMTP_RETURN_PATH
return_path = REMOTE_SMTP_RETURN_PATH
.endif
.ifdef REMOTE_SMTP_HELO_DATA
helo_data=REMOTE_SMTP_HELO_DATA
.endif
dkim_domain = mydomain.com
dkim_selector = mail1
dkim_private_key = /etc/exim4/dkim.key
.ifdef …