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I have Laravel application having SMTP configuration setup. I was using Microsoft 365 for it but it got same fail. Then switched to sendGrid but it also got fail. This is the error I am getting: Expected response code “250” but got code “550”, with message “550 5.7.1 Sending from domain o1.eu is not allowed”.
Below are my env file details:
MAIL_MAILER=smtp
MAIL_HOST=smtp.sendgrid.net
MAIL_PORT=587
MAIL_USERNAME=apikey
MAIL_PASSWORD=my_api_key
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS=customer_invoices@o1.eu
MAIL_FROM_NAME="Laravel - DEV"
Please guide me how I can get my SMTP to work.
We’ve used different options, but nothing really worked out. Any idea what we’re doing wrong?
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