How To Send Emails Using PHPMailer With Yandex Mail For Domain

Recently, Yandex.Mail had started throwing the following error when trying to to send mail via SMTP when authenticating via the normal plain text login:

Failed to authenticate password. Error: 535 5.7.8 Error: authentication failed: This user does not have access rights to this service.

So I did a little research and found out that using XOAUTH2 authentication is possible. So I am now sharing how to do this with you.

Setting Things Up

Create The Yandex OAuth2 Client

First we need to create a OAuth2 client using the email you want to connect via SMTP. To do this, make sure you are logged into the required email account, and go to Then click the “Create New Client” button. You will be directed to a form like the following:

Put any name you like in the app name field, and make sure you have checked the Sending Messages Via Yandex.Mail On The SMTP Protocol permission under Yandex.Mail.

Put you website’s url into the callback url field and click the “Create App” button. You will be directed to a page containing some information about the client that looks like the following image:

Do not close this tab because you will need it in the future.

Install The PHP Dependencies

To use oauth2 authentication with PHP, you will need a load of dependencies, so you will need to use composer to install them.

Install PHP 7.4 on your local computer from Then install composer using the installer from

To install the dependencies, run the following commands in a cmd.

cd path\to\your\project
composer require phpmailer/phpmailer
composer require aego/oauth2-yandex

composer will generate a vendor folder in your project directory, which you can later upload to infinityfree.

Get The Refresh Token

We need to get a “refresh token” for oauth2 to work.

First, go to - Replace xxxxxxxxx with the ID from the tab containing the information about your client.

You will be redirect to your site’s home page, but with a parameter called code which contain the authorization code, eg: Copy this code.

Now to get the refresh code, go to, and put to the url, switch to the content tab, select JSON from the dropdown, and put the following inside the content box (change the code, client_id and client_secret's values):

    "grant_type": 'authorization_code'
    "code": 'put the code you just copied here'
    "client_id": 'put the ID from the client information here'
    "client_secret": 'put the password from the client information here'

Finally hit send! In the response section’s body, you will see the refresh_token key. Copy the value of refresh_token .

The Email Code

Now finally, you can use the following code to send the email!

// Import the PHPMailer Library
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\OAuth;

// Import the Yandex provider for the OAuth-Client library
use Aego\OAuth2\Client\Provider\Yandex;

// Load composer's autoloader
require 'vendor/autoload.php';

// Create PHPMailer object
$mail = new PHPMailer();

// Use smtp

// Enable smtp debugging

// Set smtp host
$mail->Host = '';

// Set smtp port
$mail->Port = 465;

// Set smtp encryption to smtps
$mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;

// Enable smtp authentication
$mail->SMTPAuth = true;

// Set the authentication method to XOATH2
$mail->AuthType = 'XOAUTH2';

// Set this to your domain's email
$email = '';

// Set this to your client id (from the client information)
$clientId = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

// Set this to your client password (from the client information)
$clientSecret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

// Set this to your refresh token (the one you just copied)
$refreshToken = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

$provider = new Yandex(
        'clientId' => $clientId,
        'clientSecret' => $clientSecret,

    new OAuth(
            'provider' => $provider,
            'clientId' => $clientId,
            'clientSecret' => $clientSecret,
            'refreshToken' => $refreshToken,
            'userName' => $email,

// Set the email's from name
$mail->setFrom($email, 'CodeIgniter 4 - JNote');

// Set the email's recipients 
$mail->addAddress('', 'Induwara16');

// Set the email's charset
$mail->CharSet = PHPMailer::CHARSET_UTF8;

// Set the email subject and body
$mail->Subject = 'Test';
$mail->msgHTML('This Is A Test');

// Send the email!
if ($mail->send()) {
    echo "Success!";
} else {
   echo $mail->ErrorInfo;

This code is based on the PHPMailer GMail XOAUTH2 Example, except it uses the Yandex Provider instead of the Google Provider for the oauth2-client library.

Uploading to InfinityFree

I recommend using FileZilla to upload the files to infnityfree. Just make sure you upload the vendor folder too!

If anything is unclear, please reply to the topic and I’ll help!


@Dev-I-J A small fix, it should be vendor and not vender.

Nice Article :tada:

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Thanks @anon77371365 :grinning_face_with_smiling_eyes: ! I will correct the typo.

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shd be vendor @Dev-I-J

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I fixed it

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Yes. Or if you want to use the password that you use to sign in,
1.Go to your inbox
2.Click on the Gear icon
3.Click more settings
4. In the left side nav menu click ‘email clients’ use portal password.


AFIAK that only works for IMAP not SMTP. I tried with smtp but it still failed. (and it’s not secure either)

Works on WordPress sites. I use this method for non paying clients. They use Gmail for managing their emails.


What is the plugin you’re using?



Ah ok

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It will not work. I have used Yandex.Mail and it’s not receiving any mail. I have tested it out. Use Zoho Mail the best Free email service. See my email Its using Zoho Free Email Service and I have created it for business on YouTube. It’s totally working and receiving all mails and working in a real way, not like that stupid Yandex. And setting it up is really easy.

Note that this article is about sending email with Yandex, not receiving email with Yandex. I’m fairly sure you can receive email with Yandex too, but it requires some additional steps not covered by this guide.


You can’t create emails for free domains on zoho like ml, gq, etc. And as admin pointing out this guide is about sending mail but not receiving.

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Cause Zoho don’t want spam (I mean anyone can get those free domians, don’t they? ANd the spammers use the .tk domain a lot) No offence, just trying to help.

I have tried sending that too, but it’s doing nothing. Well, probably now I know why Google is winning hearts of the internet people.

Did you get any error messages when sending mail using this code?

I got error when going to take refresh_token
I used method POST with code

"grant_type": "authorization_code",
"code": "mycode",
"client_id": "myclientid",
"client_secret": "secretcode"

I have to change from '=>" in this code and leave a , at the end of row
My error:

    "error": "invalid_request",
    "error_description": "grant_type not in POST"

You probably forgot to set the dat type to json

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Anyway there are more than that site to send requests. You could also send requests through python (urllib or requests) if you have python on your computer.