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Published: Aug 30, 2023 License: Apache-2.0 Imports: 6 Imported by: 1,711



Package mail provides the means of sending email from an App Engine application.


msg := &mail.Message{
	Sender:  "",
	To:      []string{"Juliet <>"},
	Subject: "See you tonight",
	Body:    "Don't forget our plans. Hark, 'til later.",
if err := mail.Send(c, msg); err != nil {
	log.Errorf(c, "Alas, my user, the email failed to sendeth: %v", err)



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func Send

func Send(c context.Context, msg *Message) error

Send sends an email message.

func SendToAdmins

func SendToAdmins(c context.Context, msg *Message) error

SendToAdmins sends an email message to the application's administrators.


type Attachment

type Attachment struct {
	// Name must be set to a valid file name.
	Name      string
	Data      []byte
	ContentID string

An Attachment represents an email attachment.

type Message

type Message struct {
	// Sender must be set, and must be either an application admin
	// or the currently signed-in user.
	Sender  string
	ReplyTo string // may be empty

	// At least one of these slices must have a non-zero length,
	// except when calling SendToAdmins.
	To, Cc, Bcc []string

	Subject string

	// At least one of Body or HTMLBody must be non-empty.
	Body     string
	HTMLBody string

	Attachments []Attachment

	// Extra mail headers.
	// See
	// for permissible headers.
	Headers mail.Header

A Message represents an email message. Addresses may be of any form permitted by RFC 822.

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