From golang-nuts: https://groups.google.com/d/msg/golang-nuts/ywPpNlmSt6U/0Mxttkx9kgQJ

mailer := gomail.NewMailer("smtp.office365.com", "[email protected]", "password", 587)

Returns error 504 5.7.4 Unrecognized authentication type

dialandsend return an error when inside a privileged docker container When inside a kubernetes, the error does not seem to happen, but the email do not get sended.

web_1 | /api/register
web_1 | 172.18.0.1 - - [10/Apr/2016:20:51:59 +0000] "POST /api/register HTTP/1.1" 200 78
web_1 | http://localhost:9001/api/confirm/$2a$04$6Dad45u6SlTB7rWTNz2GzOc3j9jWOjT.1oTjfuvO5Bd8gKGwnvX56
web_1 | panic: x509: failed to load system roots and no roots provided
web_1 | 
web_1 | goroutine 49 [running]:
web_1 | panic(0x9f49c0, 0xe2e628)
web_1 |         /usr/lib/go/src/runtime/panic.go:464 +0x3e6
web_1 | bitbucket.org/cescoferraro/templatego/src/backend/api.SendRegisterEmail(0xc820210b60, 0x0, 0x0, 0xc8201f99d0, 0x9, 0xc8201fd540, 0x1b, 0xc820200b00, 0x3c, 0x0, ...)
web_1 |         /home/cesco/code/go/src/bitbucket.org/cescoferraro/templatego/src/backend/api/register.go:85 +0x7af
web_1 | created by bitbucket.org/cescoferraro/templatego/src/backend/api.RegisterEndPoint
web_1 |         /home/cesco/code/go/src/bitbucket.org/cescoferraro/templatego/src/backend/api/register.go:55 +0x656
templatego_web_1 exited with code 2

somehow running the go get gopkg.in/gomail.v1 in centos 6 is not working.. it just stuck there for very very long. and i check the $GOPATH/src/gopkg.in folder its empty... and i have been very curious why is it not go get github.com/go-gomail/gomail instead...

` message.SetBody("text/plain", "Hello pj")

message.AddAlternative("text/html", "Hello html <b>pj</b>")

` This produces:

`

--908b4cfdd408aaeb4ad5a5525eed978aa6361f8e322bf69397de36fa21d6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hello pj --908b4cfdd408aaeb4ad5a5525eed978aa6361f8e322bf69397de36fa21d6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hello html pj --908b4cfdd408aaeb4ad5a5525eed978aa6361f8e322bf69397de36fa21d6-- `

Hotmail shows the html version. Gmail shows the html version.

Hi .

I am trying to relay on a server with no authentication . using a telnet client , I can simply :

1. telnet MyServer MyPort
2. Helo
3. MAIL FROM: [email protected]
4. RCPT TO: [email protected]
5. SUBJECT:how are you?
6. period (.)

I tried to create an Auth with Start function that returns immediately , with empty return value , or "MAIL FROM:" , but I guess no matter what I do , smtp package will go through : code, msg64, err := c.cmd(0, "AUTH %s %s", mech, resp64) that the server will decline .

Do you have an idea for doing anonymous connection/ESMTP AUTH . my best help so far was http://www.fehcom.de/qmail/smtpauth.html

Thanks .

When I tried to test send an email using my gmail account I get the follow:

panic: 534 5.7.9 Please log in with your web browser and then try again. Learn more at
5.7.9  https://support.google.com/mail/?p=WebLoginRequired d134sm2180690ywb.23 - gsmtp

Here's a small Golang program which demonstrates the problem:

package main

import (
    "gopkg.in/gomail.v2"
    "os"
)

func main() {
    m := gomail.NewMessage()
    m.SetHeader("From", "[email protected]")
    m.SetHeader("To", "[email protected]")
    m.SetHeader("Subject", "{$firstname} Bienvendio a Apostólica, aquí inicia el camino de tu")
    m.SetBody("text/plain", "Hello, World")
    m.WriteTo(os.Stdout)
}

This program will output these headers:

Mime-Version: 1.0
Date: Wed, 16 Mar 2016 09:08:29 -0400
From: [email protected]
To: [email protected]
Subject: =?UTF-8?q?{$firstname}_Bienvendio_a_Apost=C3=B3lica,_aqu=C3=AD_inicia_el_camino_de_tu?=
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Note that the Subject header line is 96 characters long. According to RFC 2047,

While there is no limit to the length of a multiple-line header field, each line of a header field that contains one or more 'encoded-word's is limited to 76 characters.

The Subject header should have been folded at 76 characters but it was not.

I use gmail account to send a email,but it return a error with a warning. I can fixed it by turn off some secure stuff. https://support.google.com/accounts/answer/6010255?hl=en

Can this stuff be fixed in this library?

It would be nice to be able to export gomail.Message to []byte. I would suggest a function Raw() []byte on Message.

I could implement this and make a pull request.

I made a quick review of your code and I think you open close a connection for each Send (https://github.com/go-gomail/gomail/blob/master/send.go#L22).

I want to implement a job to send emails from a queue in bulk, but reusing the connection to be as more efficient as possible.

I miss something from your API?

Thanks!

Hi,

as far as I understood your code you implement the smtp.Auth interface which is then used by the smtp package when calling c.Auth().

In auth.go you implement LOGIN and PLAIN mechanisms. Have you ever thought about implementing CRAM-MD5?

You would have to return CRAM-MD5 in Auth.Send, listen for the base64 encoded challenge in Auth.Next, decode it and return (base64 encoded) the username and a MD5 response à la

digest = MD5(('password' XOR opad), MD5(('password' XOR ipad), challenge)).

Details can be found in this Tutorial and RFC 2195.

There is an issue where if the template crashes, the gomail.Send(sender, msg) returns the error, therefore implying correct error handling, but the email is sent regardless of template execution. I.e.: the html contains:

a class="button-3" href="{{.Data.ConfirmationLink}}"> Confirm Email

where Data is a map. the template is configured for "missingkey=error", so if Data does not contain this key, the function tmp.execute(w, mail) will return an error. However, the email will still be sent: As seen, with the error log being:

{"level":"error","time":"2022-12-27T13:47:24+03:00","message":"Could not send email to "xxx": gomail: could not send email 1: template: emailConfirmation.html:110:53: executing "emailConfirmation.html" at <.Data.ConfirmationLink>: map has no entry for key "ConfirmationLink""}

I might be wrong in pointing this out, but in my opinion, if an error is found while executing the message template writer, the whole message should be discarded

I'm trying to send a mail using gomail. It was working well. I did send many test mails to my gmail (to check how email template renders) and now I got this error. I tried sending test mails to a different mail id (my yahoo.com mail) but I get the same error.

What does this error actually mean. Is there a problem in the recipient address or in my server's code (sender). If the problem lies in the recipient address (as the error message says) then why am I not able to send mails to a completely different address. Also what is this sending quota and how to increase it ?

What I already checked

1. My inboxes (of both sending and receiving mail addresses) are no where close to full.
2. Other normal mails (sent manually from some email client) works (no issues in any mail configurations [SMTP/POP3 etc.])

Not forgetting the code

func SendMail(mail_options map[interface{}]interface{}) {

	from := mail_options["from"].(string)
	pass := mail_options["password"].(string)
	to := mail_options["to"].([]string)

	host := mail_options["host"].(string)
	port := 587

	subject := mail_options["subject"].(string)
	mail_body := mail_options["body"].(string)

	msg := gomail.NewMessage()

	msg.SetHeader("From", from)
	msg.SetHeader("To", to...)

	msg.SetHeader("Subject", subject)

	msg.SetBody("text/html", mail_body)

	// msg.attach("/path/to/file")

	mail := gomail.NewDialer(host, port, from, pass)

	err := mail.DialAndSend(msg)

	if err != nil {
		fmt.Println("ERROR: in sending mail")
		utils.LogError(err) // A working function to log errors to a file.
	}
}

Full Error Message

ERROR: 2022/09/01 10:26:39 logger.go:27: gomail: could not send email 1: 550 5.4.6 <[email protected]>: Recipient address rejected: Email Sending Quota Exceeded

Someone please help 🙏🙏

Hi, I have updated the go version from 1.15 to 1.18. But while sending with version 1.18, mails not receiving to yahoo accounts. Getting the error message 5.6.7(destination does not support SMTPUTF8 required for message delivery). Working fine with version 1.15.

Is there any way to create an email and,instead of sending it with SMTP or so, saving the email on disk in .eml format so another software take care of sending it?

Thanks