postfix+dovecot配置SSL

postfix+dovecot配置SSL

确保postfix和dovecot不配置SSL可以正常使用

配置SSL证书

配置证书

1. cd /etc/pki/tls/certs
2. 生成加***
   [root@abc certs]# make server.key
   umask 77 ;
   /usr/bin/openssl genrsa -aes128 2048 > server.key
   Generating RSA private key, 2048 bit long modulus
   …+++
   …+++
   e is 65537 (0x10001)
   Enter pass phrase: #输入密码
   Verifying - Enter pass phrase: #再次输入密码
3. [root@abc certs]# openssl rsa -in server.key -out server.key
   Enter pass phrase for server.key:#输入密码
   writing RSA key
4. 生成证书
   [root@abc certs]# make server.csr
   umask 77 ;
   /usr/bin/openssl req -utf8 -new -key server.key -out server.csr
   You are about to be asked to enter information that will be incorporated
   into your certificate request.
   What you are about to enter is what is called a Distinguished Name or a DN.
   There are quite a few fields but you can leave some blank
   For some fields there will be a default value,
   If you enter ‘.’, the field will be left blank.

---

Country Name (2 letter code) [XX]:CN #国家
State or Province Name (full name) []:jiangsu #省份
Locality Name (eg, city) [Default City]:suzhou #城市
Organization Name (eg, company) [Default Company Ltd]????*** #公司
Organizational Unit Name (eg, section) []????*** #部门
Common Name (eg, your name or your server’s hostname) []:mail.***.com.cn #名字或者服务器名称
Email Address []:test1@***.com.cn #邮箱

Please enter the following ‘extra’ attributes
to be sent with your certificate request
A challenge password []: #回车
An optional company name []:#回车
[root@abc certs]# openssl x509 -in server.csr -out server.crt -req -signkey server.key -days 3650 #证书有效期10年
Signature ok
subject=/C=CN/ST=jiangsu/L=suzhou/O=***/OU=***/CN=mail.***.com.cn/emailAddress=test1@***.com.cn
Getting Private key

配置postfix

1. [root@abc postfix]# pwd
   /etc/postfix
   [root@abc postfix]# vi main.cf
   在最后加上
   smtpd_use_tls = yes
   smtpd_tls_cert_file = /etc/pki/tls/certs/server.crt
   smtpd_tls_key_file = /etc/pki/tls/certs/server.key
   smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_scache
2. 相同路径下
   vi master.cf
   取消注释下面这两行，可以/smtps查找一下
   smtps inet n - n - - smtpd
   -o smtpd_tls_wrappermode=yes

配置dovecot

vi /etc/dovecot/conf.d/10-ssl.conf
修改下面三行
ssl = yes

ssl_cert = </etc/pki/tls/certs/server.crt
ssl_key = </etc/pki/tls/certs/server.key

启动 postfix和dovecot

dovecot -p
输入密码
systemctl start postfix

可以通过查看mail日志确定是否发送成功
vi /var/log/maillog

配置foxmail

这样在foxmail配置服务器的时候可以勾选ssl

如果dns解析不出服务器域名，可以在C:\Windows\System32\drivers\etc路径下直接修改hosts文件，增加IP和域名的对应关系

参考博文:https://blog.csdn.net/Jesus_loves_me/article/details/89202759