README
¶
Go Simple Mail
The best way to send emails in Go with SMTP Keep Alive and Timeout for Connect and Send.
IMPORTANT This example is for version 2.2.0 and above.
Version 2.1.3 and below use "text/html" and "text/plain" in SetBody and AddAlternative Also 2.0.0 and below go to this doc https://gist.github.com/xhit/54516917473420a8db1b6fff68a21c99
Introduction
Go Simple Mail is a simple and efficient package to send emails. It is well tested and documented.
Go Simple Mail can only send emails using an SMTP server. But the API is flexible and it is easy to implement other methods for sending emails using a local Postfix, an API, etc.
Features
Go Simple Mail supports:
- Multiple Attachments with path
- Multiple Attachments in base64
- Multiple Recipients
- Priority
- Reply to
- Set other sender
- Set other from
- Embedded images
- HTML and text templates
- Automatic encoding of special characters
- SSL and TLS
- Unencrypted connection (not recommended)
- Sending multiple emails with the same SMTP connection (Keep Alive or Persistent Connection)
- Timeout for connect to a SMTP Server
- Timeout for send an email
- Return Path
- Alternaive Email Body
- CC and BCC
- Add Custom Headers in Message
- Send NOOP, RESET, QUIT and CLOSE to SMTP client
Documentation
https://godoc.org/github.com/xhit/go-simple-mail
Download
go get -u github.com/xhit/go-simple-mail
Usage
package main
import (
"github.com/xhit/go-simple-mail"
"log"
)
func main() {
htmlBody :=
`<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Hello Gophers!</title>
</head>
<body>
<p>This is the <b>Go gopher</b>.</p>
<p><img src="cid:Gopher.png" alt="Go gopher" /></p>
<p>Image created by Renee French</p>
</body>
</html>`
server := mail.NewSMTPClient()
//SMTP Server
server.Host = "smtp.example.com"
server.Port = 587
server.Username = "test@example.com"
server.Password = "examplepass"
server.Encryption = mail.EncryptionTLS
//Variable to keep alive connection
server.KeepAlive = false
//Timeout for connect to SMTP Server
server.ConnectTimeout = 10 * time.Second
//Timeout for send the data and wait respond
server.SendTimeout = 10 * time.Second
//SMTP client
smtpClient,err :=server.Connect()
if err != nil{
log.Fatal(err)
}
//New email simple html with inline and CC
email := mail.NewMSG()
email.SetFrom("From Example <nube@example.com>").
AddTo("xhit@example.com").
AddCc("otherto@example.com").
SetSubject("New Go Email")
email.SetBody(mail.TextHTML, htmlBody)
email.AddInline("/path/to/image.png", "Gopher.png")
//Call Send and pass the client
err = email.Send(smtpClient)
if err != nil {
log.Println(err)
} else {
log.Println("Email Sent")
}
}
Send multiple emails in same connection
//Set your smtpClient struct to keep alive connection
server.KeepAlive = true
toList := [3]string{"to1@example1.com", "to3@example2.com", "to4@example3.com"}
for _, to := range toList {
//New email simple html with inline and CC
email := mail.NewMSG()
email.SetFrom("From Example <nube@example.com>").
AddTo(to).
SetSubject("New Go Email")
email.SetBody(mail.TextHTML, htmlBody)
email.AddInline("/path/to/image.png", "Gopher.png")
//Call Send and pass the client
err = email.Send(smtpClient)
if err != nil {
log.Println(err)
} else {
log.Println("Email Sent")
}
}
Documentation
¶
Index ¶
- Constants
- type Email
- func (email *Email) AddAddresses(header string, addresses ...string) *Email
- func (email *Email) AddAlternative(contentType contentType, body string) *Email
- func (email *Email) AddAttachment(file string, name ...string) *Email
- func (email *Email) AddAttachmentBase64(b64File string, name string) *Email
- func (email *Email) AddBcc(addresses ...string) *Email
- func (email *Email) AddCc(addresses ...string) *Email
- func (email *Email) AddHeader(header string, values ...string) *Email
- func (email *Email) AddHeaders(headers textproto.MIMEHeader) *Email
- func (email *Email) AddInline(file string, name ...string) *Email
- func (email *Email) AddTo(addresses ...string) *Email
- func (email *Email) GetError() error
- func (email *Email) GetMessage() string
- func (email *Email) Send(client *SMTPClient) error
- func (email *Email) SetBody(contentType contentType, body string) *Email
- func (email *Email) SetDate(dateTime string) *Email
- func (email *Email) SetFrom(address string) *Email
- func (email *Email) SetPriority(priority priority) *Email
- func (email *Email) SetReplyTo(address string) *Email
- func (email *Email) SetReturnPath(address string) *Email
- func (email *Email) SetSender(address string) *Email
- func (email *Email) SetSubject(subject string) *Email
- type SMTPClient
- type SMTPServer
Constants ¶
const ( // EncryptionNone uses no encryption when sending email EncryptionNone encryption = iota // EncryptionSSL sets encryption type to SSL when sending email EncryptionSSL // EncryptionTLS sets encryption type to TLS when sending email EncryptionTLS )
const ( // EncodingNone turns off encoding on the message body EncodingNone encoding = iota // EncodingBase64 sets the message body encoding to base64 EncodingBase64 // EncodingQuotedPrintable sets the message body encoding to quoted-printable EncodingQuotedPrintable )
const ( // TextPlain sets body type to text/plain in message body TextPlain contentType = iota // TextHTML sets body type to text/html in message body TextHTML )
const ( // PriorityLow sets the email priority to Low PriorityLow priority = iota // PriorityHigh sets the email priority to High PriorityHigh )
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Email ¶
type Email struct {
Charset string
Encoding encoding
Error error
SMTPServer *smtpClient
// contains filtered or unexported fields
}
Email represents an email message.
func NewMSG ¶
func NewMSG() *Email
NewMSG creates a new email. It uses UTF-8 by default. All charsets: http://webcheatsheet.com/HTML/character_sets_list.php
func (*Email) AddAddresses ¶
AddAddresses allows you to add addresses to the specified address header.
func (*Email) AddAlternative ¶
AddAlternative allows you to add alternative parts to the body of the email message. This is most commonly used to add an html version in addition to a plain text version that was already added with SetBody.
func (*Email) AddAttachment ¶
AddAttachment allows you to add an attachment to the email message. You can optionally provide a different name for the file.
func (*Email) AddAttachmentBase64 ¶
AddAttachmentBase64 allows you to add an attachment in base64 to the email message. You need provide a name for the file.
func (*Email) AddBcc ¶
AddBcc adds a Bcc address. You can provide multiple addresses at the same time.
func (*Email) AddHeaders ¶
func (email *Email) AddHeaders(headers textproto.MIMEHeader) *Email
AddHeaders is used to add multiple headers at once
func (*Email) AddInline ¶
AddInline allows you to add an inline attachment to the email message. You can optionally provide a different name for the file.
func (*Email) GetMessage ¶
GetMessage builds and returns the email message
func (*Email) Send ¶
func (email *Email) Send(client *SMTPClient) error
Send sends the composed email
func (*Email) SetDate ¶
SetDate sets the date header to the provided date/time. The format of the string should be YYYY-MM-DD HH:MM:SS Time Zone.
Example: SetDate("2015-04-28 10:32:00 CDT")
func (*Email) SetPriority ¶
SetPriority sets the email message priority. Use with either "High" or "Low".
func (*Email) SetReplyTo ¶
SetReplyTo sets the Reply-To address.
func (*Email) SetReturnPath ¶
SetReturnPath sets the Return-Path address. This is most often used to send bounced emails to a different email address.
func (*Email) SetSubject ¶
SetSubject sets the subject of the email message.
type SMTPClient ¶
SMTPClient represents a SMTP Client for send email
func (*SMTPClient) Noop ¶
func (smtpClient *SMTPClient) Noop() error
Noop send NOOP command to smtp client
func (*SMTPClient) Quit ¶
func (smtpClient *SMTPClient) Quit() error
Quit send QUIT command to smtp client
func (*SMTPClient) Reset ¶
func (smtpClient *SMTPClient) Reset() error
Reset send RSET command to smtp client
type SMTPServer ¶
type SMTPServer struct {
// From string
Encryption encryption
Username string
Password string
ConnectTimeout time.Duration
SendTimeout time.Duration
Host string
Port int
KeepAlive bool
}
SMTPServer represents a SMTP Server
func NewSMTPClient ¶
func NewSMTPClient() *SMTPServer
NewSMTPClient returns the client for send email
func (*SMTPServer) Connect ¶
func (server *SMTPServer) Connect() (*SMTPClient, error)
Connect returns the smtp client
Source Files