muttSendFile.go

package main

import (
    "fmt"
    "os"
    "os/exec"
    "strings"
)

func MuttSendFile(dstEmail, filePath string) error {
    st, err := os.Stat(filePath)
    if err != nil {
        return err
    }
    subject := fmt.Sprintf("[%d bytes] %s", st.Size(), filePath)
    mutt := exec.Command("mutt", "-a", filePath, "-s", subject, "--", dstEmail)
    mutt.Stdin = strings.NewReader("(file attached)")
    mutt.Stdout, mutt.Stderr = os.Stdout, os.Stderr
    return mutt.Run()
}