smtp

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  package main
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  import (
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    "log"
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    "net/smtp"
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  )
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  var (
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    from = "test@immwind.com"
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    // To From Subject 非必须
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    msg = []byte("To:hi@example.com\r\n" +
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        "From: test@example.com\r\n" +
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        "Subject: Hello World\r\n" +
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        "\r\n" +
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        "这是测试邮件\n\r")
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    recipients = []string{"hi@immwind.com"}
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  )
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  func main() {
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    hostname := "smtp.exmail.qq.com"
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    auth := smtp.PlainAuth("", "test@example.com", "password", hostname)
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    err := smtp.SendMail(hostname+":25", auth, from, recipients, msg)
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    if err != nil {
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        log.Fatal(err)
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    }
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  }