4.0.0 org.dromara.sms4j sms4j-Email-plugin 3.1.0 org.dromara.sms4j sms4j-Email-comm 3.1.0 sms4j-Email-comm sms4j-Email-comm Apache 2 https://www.apache.org/licenses/LICENSE-2.0.txt repo A business-friendly OSS license cn.hutool hutool-cron cn.hutool hutool-http com.sun.mail javax.mail compile