Personally I use mandrill and yes it's free
Visit mandrill dashboard.
Generate a API key, via this page https://mandrillapp.com/settings/
Copy the key.
Login to your FTP account.
Open and edit .env
file.
Remove
MAIL_DRIVER=smtp
MAIL_HOST=mailtrap.io
MAIL_PORT=2525
MAIL_USERNAME=null
MAIL_PASSWORD=null
MAIL_ENCRYPTION=tls
SENDERS_EMAIL=null
SENDERS_NAME=null
MAIL_DRIVER=mandrill
MAIL_ENCRYPTION=tls
SENDERS_EMAIL=youremailhere@example.com
SENDERS_NAME=Your Site Name
MANDILL_SECRET=YourKeyHere
Replace Your Site Name
, youremailhere@example.com
and YourKeyHere
with your name, email and your mandrill key.
Save and upload the file.
You are done.
If you like test your setting please visit here Testing STMP