I have the same problem

Client error response [url] https://api.mailgun.net/v2/https://api.mailgun.net/v2//.mailgu... [status code] 404 [reason phrase] NOT FOUND

2 months ago configured it and it worked perfect, but not anymore

Same here, any suggestions? "Client error response [url] https://api.mailgun.net/v2//messages.mime [status code] 404 [reason phrase] NOT FOUND"

I had this issue but I had forgotten to add my domain and secret under /config/services.php

	'mailgun' => [
    'domain' => 'your-mailgun-domain',
    'secret' => 'your-key',
],

Thanks you @dylanglockler.

dylanglockler said:

I had this issue but I had forgotten to add my domain and secret under /config/services.php

  'mailgun' => [
   'domain' => 'your-mailgun-domain',
   'secret' => 'your-key',

],

itsazzad said:

Thanks you @dylanglockler.

dylanglockler said:

I had this issue but I had forgotten to add my domain and secret under /config/services.php

 'mailgun' => [
   'domain' => 'your-mailgun-domain',
   'secret' => 'your-key',

],

Except that everyone shows yourdomain.com in examples, but really you need to sent it to mg.yourdomain.com as per the DNS domain setup procedure that mailgun.com guides you through on setup of account