“User is not set” IncompleteDsnException after migrating to Laravel 9

I was using Laravel 8.64, and my emails were working fine both on prod and dev servers. However, after upgrading to 9.0.2, I have an issue with sending emails. Of course, I followed all instructions, but still, I get errors when I try to send an email.

User is not set. {“exception”:”[object] (SymfonyComponentMailerExceptionIncompleteDsnException(code: 0): User is not set.

After some reasearch in vendor folder i found class AbstractTransportFactory that contains getUser method.

protected function getUser(Dsn $dsn): string
{
    $user = $dsn->getUser();
    if (null === $user) {
        throw new IncompleteDsnException('User is not set.');
    }

    return $user;
}

When I return ''; in this if statement, everything is working fine instead of throwing an exception. Does anyone know the solution for this and why this is happening

Answer

I had the same issue.

Make sure that your .env file contains: MAILGUN_DOMAIN=your.domain.com MAILGUN_SECRET=your.mailgun.secret

This would be reflected as the username/password for the DSN.

Cheers