'sending mail in Laravel 5.4 using Mailgun get error code " 401 UNAUTHORIZED` response: Forbidden "

I'm trying to send mail in Laravel 5.4 project with Mailgun. I think I set the configuration correctly. But, I got this error message such as

ClientException in RequestException.php line 111: Client error: POST https://api.mailgun.net/v3/sandboxfeb88d58f18841738b2fc81d7cbc7631.mailgun.org/messages.mime >resulted in a 401 UNAUTHORIZED response: Forbidden

Here is my configuration:

in .env file

MAIL_DRIVER=mailgun
MAILGUN_DOMAIN=sandboxfeb88d58f18841738b2fc81d7cbc7631.mailgun.org
MAILGUN_SECRET=pubkey-1767e**********

in mail.php file

'driver' => env('MAIL_DRIVER', 'smtp'),
'host' => env('MAIL_HOST', 'smtp.mailgun.org'),
'port' => env('MAIL_PORT', 587),
'from' => [
    'address' => env('MAIL_FROM_ADDRESS', '[email protected]'),
    'name' => env('MAIL_FROM_NAME', 'Richi Htoo'),
],

in services.php file

'mailgun' => [
    'domain' => env('MAILGUN_DOMAIN'),
    'secret' => env('MAILGUN_SECRET'),
],

and I wrote mail sending code in default route such as

Route::get('/', function () {
//return view('welcome');

    $data = [
        'title' => 'Hi student I hope you like the course',
        'content' => 'This laravel course was created with a lot of love and dedication for you'
    ];

    Mail::send('emails.test', $data, function($message){
        $message->to('[email protected]', 'White Nuzzle')->subject('Hello student how are you?');
    });
});

And I also installed Laravel Package "guzzlehttp/guzzle" version 6.2 to send mail.

But when I call that default home route, I got an error message as I mention above.

I can't find any solution for my error in any where including this forum "stackoverflow.com".

Can anyone help me please?

Solution 1:^[1]

Frankly it was quite an ordeal, I made the sandbox worked as following

Added authorized recipient - Apparently sandbox can't send email to anyone, you need to add them as authorized recipient.
Use proper credentials in .env File added MAILGUN_DOMAIN and MAILGUN_SECRET too as services.php uses them. Remember MAILGUN_SECRET is the private key and starts with key-, don't use public key here
Put MAIL_DRIVER=mailgun MAIL_HOST=smtp.mailgun.org MAIL_PORT=587 MAIL_USERNAME=postmaster@sandboxcc*****************.mailgun.org MAIL_PASSWORD=****************** MAIL_ENCRYPTION=tls
!!!MOST IMPORTANT!!!! RESTART YOUR SERVER to load the new .env file.

Solution 2:^[2]

Ok found it, In the file "vendor\laravel\framework\src\Illuminate\Mail\Transport\MailgunTransport.php", the endpoint used is US one.

As said in documentation, https://documentation.mailgun.com/en/latest/api-intro.html#mailgun-regions, you have an endpoint for US and EU.

If you are european, you must use "api.eu.mailgun.net" or you get a 401.

Just change the endpoint: Laravel is powerful and they think about that. You can add an 'endpoint' key to the config/services.php/mailgun entry.

Solution 3:^[3]

If you are not using the United States Mailgun region, you can define your region's endpoint in the services configuration file:

'mailgun' => [
    'domain' => env('MAILGUN_DOMAIN'),
    'secret' => env('MAILGUN_SECRET'),
    'endpoint' => env('MAILGUN_ENDPOINT', 'api.eu.mailgun.net'),
],

Alternatively, one can define the MAILGUN_ENDPOINT in the .env file:

MAILGUN_ENDPOINT="api.eu.mailgun.net"

Solution 4:^[4]

Make sure to check your credentials for the mailgun, make sure that those are correct.

Dont copy the Public Validation Key. please copy the Private API Key

Solution 5:^[5]

Default Mail Driver: Mailgun

MAILGUN_DOMAIN=*your-domain*.mailgun.org

MAILGUN_SECRET=pubkey-*your-public-key*

Default Mail Driver: SMTP

MAIL_USERNAME=postmaster@*your-domain*.mailgun.org

MAIL_PASSWORD=*your-password*

Don't forget to php artisan config:clear

Solution 6:^[6]

I had the same issue. Check your DNS settings in the Mailgun Sending domain checklist. I found I could not get an EU MG setting to work so I suggest you use a US MG server

Solution 7:^[7]

Ok, I just want to summarize what I had to do to make Mailgun work in Laravel 8.

1. Install guzzle

composer require guzzlehttp/guzzle

2. EU or US?

I'm from EU. The Laravel Doc for Mailgun says to configure mailgun for usage in EU. This is WRONG if you're using the sandbox because it is located in the US apparently. I have a small US flag next to my sandbox url and it took me ages to figure this out.

If you want to use the sandbox put this into \config\services.php:

'mailgun' => [
    'domain' => env('MAILGUN_DOMAIN'),
    'secret' => env('MAILGUN_SECRET'),
    'endpoint' => env('MAILGUN_ENDPOINT', 'api.mailgun.net'),
],

If you want to use a domain that is registered for EU you will need to make this change:

'endpoint' => env('MAILGUN_ENDPOINT', 'api.eu.mailgun.net'),

If you put the wrong region, your log should throw 401 UNAUTHORIZED response

3. Authorize Recipients

If you're using the sandbox you need to authorize recipients. Go to your mailgun account and to your sandbox domain and authorize recipients in the email field. If you try to send an email to non-authorized recipients your log should throw an 403 FORBIDDEN response

4. Default Mailer

If you want mailgun to be your default mailer you can change this in your \config\mail.php:

'default' => env('MAIL_MAILER', 'mailgun'),

5. Credentials

These credentials made it work for me, hopefully they will make it work for you too. Put them in .env:

MAIL_DRIVER=mailgun
MAILGUN_DOMAIN=sandboxXXXXXXXXXXXXXXXXXXXXXXXXXXXX.mailgun.org
MAILGUN_SECRET=2dfXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
MAIL_HOST=smtp.mailgun.org
MAIL_PORT=587
MAIL_ENCRYPTION=tls

MAILGUN_SECRET is your private api key which can be found when go to your mailgun account and click on your profile logo -> api keys.

MAILGUN_DOMAIN is your (I believe currently used) domain and can be accessed in your mailgun account either through the dashboard or through sending->domains in the navpanel. The only not messy reference field for your domain seems to be in sending->overview-> select SMTP and copy the end part of the Username field (without postmaster@)

I hope this saves time for someone because it took forever to get it to work.

Solution 8:^[8]

Personally I never got the sandbox account to work. I just did this a little over a month ago. Sandbox never worked, but the live account I created did. Try switching to the live account and let me know if that works for you.

Solution 9:^[9]

Just go to the config folder. and made some changes..

'mailgun' => [
    'domain' => env('your_domainxxxxxxx.mailgun.org'),
    'secret' => env('key-xxxxxxxx_private_API_keyxxxx'),
],

error will be resolved.

Solution 10:^[10]

In case if you use API base mailgun, check if the domain exists. I removed my testing domain and after it tried to send a new email message from that domain. I got 401 error.

Solution 11:^[11]

I had the same problem in Symfony. Yes, it's not Laravel but they're close.

In .env file I had

MAILER_DSN=mailgun://KEY:DOMAIN@default

The error disappeared after I changed it to

MAILER_DSN=mailgun://KEY:DOMAIN@default?region=eu

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Mohammed Atif Sami
Solution 2	Dharman
Solution 3
Solution 4	Rohit Jadhav
Solution 5	Thomas
Solution 6	Andrew Plater
Solution 7
Solution 8	Fastmover
Solution 9	Kashif Saleem
Solution 10	Alexey Khachatryan
Solution 11	Ilyich

'sending mail in Laravel 5.4 using Mailgun get error code " 401 UNAUTHORIZED` response: Forbidden "

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]