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package common
import (
"crypto/tls"
"encoding/base64"
"fmt"
"net/smtp"
"strings"
)
func SendEmail(subject string, receiver string, content string) error {
if SMTPFrom == "" { // for compatibility
SMTPFrom = SMTPAccount
}
encodedSubject := fmt.Sprintf("=?UTF-8?B?%s?=", base64.StdEncoding.EncodeToString([]byte(subject)))
mail := []byte(fmt.Sprintf("To: %s\r\n"+
"From: %s<%s>\r\n"+
"Subject: %s\r\n"+
"Content-Type: text/html; charset=UTF-8\r\n\r\n%s\r\n",
receiver, SystemName, SMTPFrom, encodedSubject, content))
auth := smtp.PlainAuth("", SMTPAccount, SMTPToken, SMTPServer)
addr := fmt.Sprintf("%s:%d", SMTPServer, SMTPPort)
to := strings.Split(receiver, ";")
var err error
if SMTPPort == 465 {
tlsConfig := &tls.Config{
InsecureSkipVerify: true,
ServerName: SMTPServer,
}
conn, err := tls.Dial("tcp", fmt.Sprintf("%s:%d", SMTPServer, SMTPPort), tlsConfig)
if err != nil {
return err
}
client, err := smtp.NewClient(conn, SMTPServer)
if err != nil {
return err
}
defer client.Close()
if err = client.Auth(auth); err != nil {
return err
}
if err = client.Mail(SMTPFrom); err != nil {
return err
}
receiverEmails := strings.Split(receiver, ";")
for _, receiver := range receiverEmails {
if err = client.Rcpt(receiver); err != nil {
return err
}
}
w, err := client.Data()
if err != nil {
return err
}
_, err = w.Write(mail)
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
} else {
err = smtp.SendMail(addr, auth, SMTPAccount, to, mail)
}
return err
}
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