Mailer Collector

Captures email messages sent during a request — recipients, subject, body, and metadata.

What It Captures

Field	Description
from	Sender addresses
to	Recipient addresses
cc	CC addresses
bcc	BCC addresses
replyTo	Reply-To addresses
subject	Email subject line
textBody	Plain text body
htmlBody	HTML body
charset	Character set
date	Send date

Data Schema

{
    "messages": [
        {
            "from": [{"address": "noreply@app.com", "name": "App"}],
            "to": [{"address": "user@example.com", "name": "Test User"}],
            "cc": [],
            "bcc": [],
            "replyTo": [],
            "subject": "Welcome to App",
            "textBody": "Hello, welcome!",
            "htmlBody": "<h1>Welcome</h1>",
            "raw": "...",
            "charset": "utf-8",
            "date": "Tue, 31 Mar 2026 12:00:00 +0000"
        }
    ]
}

Summary (shown in debug entry list):

{
    "mailer": {
        "total": 1
    }
}

Contract

use AppDevPanel\Kernel\Collector\MailerCollector;

$collector->collectMessage([
    'from' => [['address' => 'noreply@app.com', 'name' => 'App']],
    'to' => [['address' => 'user@example.com', 'name' => 'Test User']],
    'subject' => 'Welcome to App',
    'textBody' => 'Hello, welcome!',
    'htmlBody' => '<h1>Welcome</h1>',
    // ...
]);

INFO

MailerCollectorAppDevPanel\Kernel\Collector\MailerCollectorCaptures email messages sent by the application.final Kernel · class · implements SummaryCollectorInterface implements SummaryCollectorInterfaceAppDevPanel\Kernel\Collector\SummaryCollectorInterfaceSummary data collector responsibility is to collect summary data for a collector. Summary is used to display a list of previous requests and select one to display full info. Its data set is specific to the list and is reduced compared to full data collected in {@see CollectorInterface}.Kernel · interface · extends CollectorInterface and depends on TimelineCollectorAppDevPanel\Kernel\Collector\TimelineCollectorCollects Timeline data during application lifecycle.final Kernel · class · implements SummaryCollectorInterface.

How It Works

Framework adapters intercept email sending through framework-specific hooks:

• Symfony: MessageEvent listener on the Mailer component
• Laravel: MessageSending event listener
• Yii 3: Mailer proxy decorator

Debug Panel

• Message list — all emails with subject, recipients, and send date
• Expandable details — full email headers, text body, and HTML body preview
• Message count — total shown in sidebar badge