process.action_mailer

Rails generated an Action Mailer message.

Source Action Mailer Category Mail Fields 18 honeybadger-ruby

Fields

18

Field	Type	Description
event_type	string	Allowed value: process.action_mailer.
mailer	string	Mailer class name, e.g. "UserMailer".
action	string	Mailer action method, e.g. "welcome_email".
message_id	string	Message-ID header of the generated email.
subject	string	Email subject line.
to	array<string>	Recipient addresses.
cc	array<string>	CC addresses.
bcc	array<string>	BCC addresses.
date	string	Email date header as a string.
attachments	array<object>	File attachments included in the email.
attachments.filename	string
params	object	Params passed to the mailer action.
params.*	any	Additional caller-defined keys.
duration	number	Duration in milliseconds.
instrumenter_id	string	Rails instrumenter UUID.
request_id	string	Rails request UUID, present on any event fired during a web request context. Merged globally by the Honeybadger agent.
hostname	string	Server hostname. Attached to every event by default (events.attach_hostname).
environment	string	Application environment, e.g. "production". Attached to every event by default (events.attach_environment).

Example

{
  "event_type": "process.action_mailer",
  "mailer": "UserMailer",
  "action": "welcome_email",
  "message_id": "684af2d1c3b4a_1a2b3c4d5e6f@web-1.example.com.mail",
  "subject": "Welcome to Example App",
  "to": [
    "user@example.com"
  ],
  "cc": [
    "support@example.com"
  ],
  "bcc": [
    "audit@example.com"
  ],
  "date": "Fri, 12 Jun 2026 14:30:00 +0000",
  "attachments": [
    {
      "filename": "welcome-guide.pdf"
    }
  ],
  "params": {
    "user_id": 123
  },
  "duration": 84.21,
  "instrumenter_id": "d6a5b3f4c2e1908a7b6c",
  "request_id": "0f5e4bb2-3c46-4b1c-91d5-2f4e8a6b9c01",
  "hostname": "web-1.example.com",
  "environment": "production"
}