Headers::UNIQUE_HEADERS

File

vendor/symfony/mime/Header/Headers.php, line 24

Class

Headers

A collection of headers.

Namespace

Symfony\Component\Mime\Header

Code

private const UNIQUE_HEADERS = [
    'date',
    'from',
    'sender',
    'reply-to',
    'to',
    'cc',
    'bcc',
    'message-id',
    'in-reply-to',
    'references',
    'subject',
];