resend / resend-go

Resend's Official Go SDK

Resend Go SDK

Installation

To install the Go SDK, simply execute the following command on a terminal:

go get github.com/resend/resend-go/v2

Setup

First, you need to get an API key, which is available in the Resend Dashboard.

Example

import (
    "fmt"
    "github.com/resend/resend-go/v2"
)

func main() {
    apiKey := "re_123"

    client := resend.NewClient(apiKey)

    params := &resend.SendEmailRequest{
        To:      []string{"to@example", "[email protected]"},
        From:    "[email protected]",
        Text:    "hello world",
        Subject: "Hello from Golang",
        Cc:      []string{"[email protected]"},
        Bcc:     []string{"[email protected]"},
        ReplyTo: "[email protected]",
    }

    sent, err := client.Emails.Send(params)
    if err != nil {
        panic(err)
    }
    fmt.Println(sent.Id)
}

You can view all the examples in the examples folder

resend-go's Issues

unable to install v2.1.0

require github.com/resendlabs/resend-go: version "v2.1.0" invalid: should be v0 or v1, not v2

Issue with send mail function

It seems like the API might be responding with incorrect response, something that is not a JSON.

Here's the error message I keep getting

invalid character 's' looking for beginning of value

Here's how I am using the SDK

func SendMail(input Params, data map[string]string) {
	client := resend.NewClient(os.Getenv("resend_api"))
	htmlStr, textStr := readTemplate(input.Template)
	for k, v := range data {
		log.Println(v)
		log.Println("{" + k + "}")
		htmlStr = strings.ReplaceAll(htmlStr, "{"+k+"}", v)
		textStr = strings.ReplaceAll(textStr, "{"+k+"}", v)
	}
	options := &resend.SendEmailRequest{
		From:    "Team Reach <[email protected]>",
		To:      []string{input.To},
		Html:    htmlStr,
		Text:    textStr,
		Subject: input.Subject,
	}
	_, err := client.Emails.Send(options)
	if err != nil {
		panic(err)
		log.Println("error sending email")
	}

}

attachments are not send when performing batch send

It looks like that attachments are send only when emailClient.Emails.SendWithContext is called but not when emailClient.Batch.SendWithContext is called. Not sure where the problem is related to the client or on the service but it would be valuable if this could be investigated and solution to be provided.

Resend client failed to send emails

I am getting this error when running the code below.

error:

error: "Post "https://api.resend.com/emails": tls: failed to verify certificate: x509: certificate signed by unknown authority"

code:

func (e *resendEmailer) SendFromTemplate(ctx context.Context, template template.Template, to string) error {
	resp, err := e.resend.Emails.Send(&resend.SendEmailRequest{
		From:    noReplyEmail,
		To:      []string{to},
		Subject: template.Subject,
		Html:    template.HTML,
	})
	if err != nil {
		log.Ctx(ctx).Error().Err(err).Msg("failed to send email")
		return err
	}

	log.Ctx(ctx).Info().Str("id", resp.Id).Msg("email sent")

	return nil
}

and here is how I initialize the client:

resendClient := resend.NewClient(config.ResendApiKey)

Error while trying to get the module

Hello, I am relatively new to golang.
I was trying to use resend SDK it threw the following error when trying to install.

go: downloading github.com/resend/resend-go v1.7.0
go: github.com/resend/resend-go@v1.7.0: parsing go.mod:
        module declares its path as: github.com/resendlabs/resend-go
                but was required as: github.com/resend/resend-go

Request with http instead of SMTP

From the code https://github.com/resendlabs/resend-go/blob/main/emails.go#L150

req, err := s.client.NewRequest(http.MethodPost, path, convertedParams)
I want to know the reason that sending email with HTTP, instead of SMTP.
Thanks