Email sending issue: Authorization error on Heroku with Laravel and Mailgun

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1

Help needed with email sending problem on Heroku

I’m facing a tricky situation with my Laravel app on Heroku. Everything works fine locally when I use Mailgun for sending emails. But after deploying to Heroku, I keep getting this error:

Unable to send an email: Forbidden (code 401)

I’ve double-checked my environment settings. Here’s what I have:

MAIL_MAILER=mailgun
MAILGUN_DOMAIN=my-sandbox-domain.mailgun.org
MAILGUN_SECRET=my-secret-key

I’m pretty sure these are correct because they work on my local machine. Any ideas why Heroku might be rejecting these? Could there be some extra step I’m missing for Heroku deployment?

I’d really appreciate any tips or suggestions. This error is blocking a key feature of my app. Thanks in advance for your help!

2

I ran into a similar issue when deploying my Laravel app to Heroku with Mailgun. After some troubleshooting, I discovered the problem was related to Heroku’s security measures.

Here’s what worked for me:

Instead of using the Mailgun API key directly, I had to use a Mailgun API key specifically generated for my Heroku app. Log into your Mailgun account, go to the API Security section, and create a new API key with a name like ‘Heroku API Key’.

Then, update your Heroku config vars with this new key:

heroku config:set MAILGUN_SECRET=your-new-heroku-specific-api-key

Also, double-check that you’re using the correct Mailgun domain. If you’re using a sandbox domain, make sure you’ve added and verified your recipient email addresses in the Mailgun dashboard.

After making these changes, my email sending started working on Heroku. Hope this helps you resolve your issue!

3

I encountered a similar authorization issue when deploying my Laravel app to Heroku with Mailgun. One crucial step that’s often overlooked is configuring the correct Mailgun region.

By default, Mailgun uses the US region, but if your account is set up in the EU region, you need to specify this in your Heroku config. Try adding this to your environment variables:

MAILGUN_ENDPOINT=https://api.eu.mailgun.net

Also, ensure you’re using the full Mailgun domain, not just the subdomain. It should look like ‘mg.yourdomain.com’ rather than just ‘yourdomain.com’.

If these don’t solve the issue, consider using Heroku’s Mailgun add-on. It automatically sets up the correct environment variables and can simplify the integration process significantly.

4

yo, u might wanna check ur heroku logs for more deets on the error. sometimes heroku can be finicky with env vars. try running heroku config to make sure ur mailgun settings r actually there. if they r, maybe try removing and re-adding em. also, double check ur mailgun account isn’t restricted or sumthin. good luck!