GoLang：无法发送带附件的电子邮件

php小编草莓今天给大家分享一篇关于GoLang的问题：无法发送带附件的电子邮件。在日常开发中，发送带附件的电子邮件是一个常见需求，但有时候我们会遇到一些问题。本文将介绍如何解决这个问题，帮助大家顺利发送带附件的电子邮件。我们将一步步解析问题的原因，并提供相应的解决方案，希望能帮到大家。

问题内容

我正在尝试使用以下代码发送带有附件的电子邮件：

package mail import ( "bytes" logging "project/logging" "fmt" "log" "mime/multipart" "net/textproto" "gopkg.in/mail.v2" ) func SendWithAttachment(from string, to []string, subject, bodyHTML string, attachmentName string, attachmentData []byte) error { logoURL := "/path/to/cs.jpg" m := mail.NewMessage() m.SetHeader("From", from) m.SetHeader("To", to...) m.SetHeader("Subject", subject) m.Embed(logoURL) // Create a multipart message body := &bytes.Buffer{} writer := multipart.NewWriter(body) // Add HTML part htmlPart := make(textproto.MIMEHeader) htmlPart.Set("Content-Type", "text/html") htmlPart.Set("Content-Transfer-Encoding", "quoted-printable") htmlPartWriter, err := writer.CreatePart(htmlPart) if err != nil { logging.NewDefaultLogger().Errorf("Error creating html part: %s", err) return err } htmlPartWriter.Write([]byte(bodyHTML)) // Add Attachment part attachmentPart := make(textproto.MIMEHeader) attachmentPart.Set("Content-Type", "application/octet-stream") attachmentPart.Set("Content-Transfer-Encoding", "base64") attachmentPart.Set("Content-Disposition", `attachment; filename="`+attachmentName+`"`) attachmentPartWriter, err := writer.CreatePart(attachmentPart) if err != nil { logging.NewDefaultLogger().Errorf("Error creating attachment part: %s", err) return err } attachmentPartWriter.Write(attachmentData) writer.Close() m.SetBody("multipart/mixed", body.String()) fmt.Printf("Sending mail.....") err = gs.dialer.DialAndSend(m) if err != nil { logging.NewDefaultLogger().Errorf("Error sending email..: %s", err) return err } return nil }登录后复制