John Davidson

Message:

I'm using Google Workspace SMTP relay service to send emails from my Laravel app. It has been working well for over more than a year now, but I'm not sure what exactly stopped it from working.
When I try to send an email I get the following error:

>>> Illuminate\Support\Facades\Mail::to('[email protected]')->send(new App\Mail\CourseEnrolmentEmail($user, App\Course::first()));



// The error

Symfony\Component\Mailer\Exception\TransportException with message 'Expected response code "250" but got an empty response.'

I suspect it is related to my upgrade from Laravel 8 to Laravel 9, but not sure how to fix it.

My mail.php

'smtp' => [

            'transport' => 'smtp',

            'host' => env('MAIL_HOST', 'smtp.mailgun.org'),

            'port' => env('MAIL_PORT', 587),

            'encryption' => env('MAIL_ENCRYPTION', 'tls'),

            'username' => env('MAIL_USERNAME'),

            'password' => env('MAIL_PASSWORD'),

            'timeout' => null,

        ],

My mail config

MAIL_DRIVER=smtp

MAIL_HOST=smtp-relay.gmail.com

MAIL_PORT=587

MAIL_ENCRYPTION=TLS

MAIL_FROM_NAME="My Name"

[email protected]

I'm authenticating via IP, so the password and username fields are not required

My GSuite Gmail routing configuration




Note
In the above config, I have tried checking TLS and also changing Allowed senders to "Only Registered Apps users in my domains" but the problem still persists.

I have tried suggestions from

1. https://laracasts.com/discuss/channels/laravel/laravel-swift-mailer-exception-expected-response-code-250-but-got-an-empty-response-using-gmail-smtp-relay-database-queue-driver

   
   



2. Laravel 9 - Infomaniak : Expected response code "250" but got code "550", with message "550 5.7.1 Sender mismatch"

   
   



3. https://stackoverflow.com/a/43283422/11752623

   
   



4. https://www.cubebackup.com/blog/how-to-use-google-smtp-service-to-send-emails-for-free/ Method 3

   
   

All of them were not successful. I appreciated your help in solving this issue.

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My Answer:
"Failed to send email: Connection refused"