SimpleMailer

KISS principle SMTP emailing solution that allows variables and template HTML emails.

An extremely simple SMTP emailing solution for your Go Language application. This golang package allows you to create a HTML email templates, and have variables inside of it by including {{USERNAME}} to be replaced by the actual username in the array. Simple Mailer can also send bulk emails without variables, checkout this package and try it out!

1. Import the package

go get github.com/hunterlong/simplemailer

import "github.com/hunterlong/simplemailer"

2. Create 'emails' folder and create a new file called 'welcome.html'

You just got an email from SimpleMailer {{USERNAME}}. I hope you enjoyed how {{DIFFICULTY}} it was to do this.

Notice the {{USERNAME}} variable inside the HTML template. You'll be able to insert many of these variables in a simple array.

3. Setup SMTP Information

// SMTP host, port, username, password, name, send from address, email directory
SimpleMailer.SetSMTPInfo("emailserveraddress.com", "465", "info@domain.com", "passwordhere", "Sender Name", "from@domain.com", "./emails/")

Be sure to set the email directory for the last parameter (./emails/) ** Keep slash on end! **

Send a Single Email with Variables

outVars := SimpleMailer.Variables{map[string]interface{}{"USERNAME":"gophers", "DIFFICULTY": "simple"}}
newOutgoing := SimpleMailer.Outgoing{
                    Email: "info@domain.com", 
                    Subject: "SimpleMailer in Golang", 
                    Template: "welcome.html", 
                    Variables: outVars }
sendSuccess := SimpleMailer.SendSingle(newOutgoing)
fmt.Println(sendSuccess)
// outputs true or false

####### This will replace {{USERNAME}} in your HTML template to 'gophers'

Send Multiple Emails with Variables

var newOutgoing []SimpleMailer.Outgoing

outVars := SimpleMailer.Variables{map[string]interface{}{"USERNAME":"billy", "DIFFICULTY": "simple"}}
newOutgoingMessage := SimpleMailer.Outgoing{Email: "firstuser@domain.com", Subject: "Welcome Email", Template: "welcome.html", Variables: outVars}
newOutgoing = append(newOutgoing, newOutgoingMessage)

secondoutVars := SimpleMailer.Variables{map[string]interface{}{"USERNAME":"l33tguy", "DIFFICULTY": "super easy"}}
secondnewOutgoingMessage := SimpleMailer.Outgoing{Email: "firstuser@domain.com", Subject: "Welcome Email", Template: "welcome.html", Variables: secondoutVars}
newOutgoing = append(newOutgoing, secondnewOutgoingMessage)

// here is where you send multiple emails from a Outgoing array
responses := SimpleMailer.SendMultiple(newOutgoing)

for _,successSend := range responses {
	userEmail := successSend["email"]
	sentStatus := successSend["status"].(bool)

	if sentStatus {
		fmt.Println("Email to "+userEmail.(string)+" was successfully sent")
	} else {
		fmt.Println("ERROR - Email to "+userEmail.(string)+" was not able to send")
	}
}

Send Multiple Emails without Variables

allEmails := []string{"info@emaildomain.com", "noreply@nodomain.com", "hey@gmail.com"}
bulkSend := SimpleMailer.BulkSend{Emails: allEmails, Subject: "Hello Bulk Sender", Template: "welcome.html"}

response := SimpleMailer.SendBulkEmails(bulkSend)

This function will send an email without variables to an array of emails

Full Example for Sending Single Email

package main

import (
	"github.com/hunterlong/simplemailer"
	"fmt"
)

func main() {

	SimpleMailer.SetSMTPInfo("emailserver-hidden.com", "465", "stmpusername", "passwordhere", "Sender Name", "info@sendfrom.com", "./emails/")

	outVars := SimpleMailer.Variables{map[string]interface{}{"USERNAME":"gophers", "DIFFICULTY": "simple"}}
	newOutgoing := SimpleMailer.Outgoing{
		Email: "info@sendtoemail.com",
		Subject: "SimpleMailer in Golang",
		Template: "welcome.html",
		Variables: outVars }
	sendSuccess := SimpleMailer.SendSingle(newOutgoing)

	fmt.Println(sendSuccess)
	// outputs true if it was sent, false if error

}

Google Gmail SMTP info

SimpleMailer.SetSMTPInfo("smtp.gmail.com", "465", "<gmail email>", "<gmail password>", "Sender Name", "<gmail email>", "./emails/")

Yahoo Mail SMTP info

SimpleMailer.SetSMTPInfo("smtp.mail.yahoo.com", "465", "<yahoo email>", "<yahoo password>", "Sender Name", "<yahoo email>", "./emails/")

Outlook Office 365 SMTP info

SimpleMailer.SetSMTPInfo("smtp.office365.com", "587", "<outlook email>", "<outlook password>", "Sender Name", "<outlook email>", "./emails/")

Awesome HTML Email Templates

https://github.com/leemunroe/responsive-html-email-template

https://github.com/mailgun/transactional-email-templates

https://github.com/mailchimp/email-blueprints

https://github.com/InterNations/antwort

https://github.com/g13nn/Email-Framework