メールの作成 create-email

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For complete understanding, this information should be combined with the documentation on this page. Neither source is intended to stand alone; the page describes the feature, while this section provides additional context that helps disambiguate terminology, intent, applicability, and constraints.

• TL;DR: This page explains how to create an email in Journey Optimizer by adding an Email action to a journey or campaign, defining its subject and content in the Email Designer, resolving alerts, optimizing HTML size, and previewing before sending.

Intents:

• Add an Email action to a journey or a campaign
• Define the email subject line and body with the Email Designer
• Enable decisioning to add decision policies to an email
• Resolve warning and error alerts before testing or activating
• Enable and test HTML size optimization to avoid email clipping
• Preview and validate the email before sending

Glossary:

• Email action: The channel action added to a journey or campaign that sends an email when profiles reach that step (product-specific)
• Email Designer: The Journey Optimizer editor used to build and personalize the email body (product-specific)
• Optimize HTML size: An option that compresses the email HTML at publication time (removing unnecessary whitespace and indentation) to reduce size and avoid clipping (product-specific)
• Alerts: In-interface messages raised when key settings are missing — Warnings (recommendations/best practices) and Errors (blocking issues) (product-specific)
• Decision policy: A container for offers that uses the Decisioning engine to return the best content for each audience member (in Limited Availability for emails) (product-specific)

Guardrails:

• The subject line is mandatory and must not include line breaks.
• Legacy native channel activities (Email, Push, SMS, In-app, Web, Code-based experience, and Content Card) are deprecated as of the March 2026 release; existing journeys using them continue to work without changes and no migration is required.
• Decision policy creation in emails is in Limited Availability — contact your Adobe representative to gain access.
• All error alerts (for example a missing subject line, an empty email version, or a deleted configuration) must be resolved before you can test or activate the journey/campaign; warnings do not block.
• HTML size optimization is not applied automatically — you must enable it manually — and is applied only at publication time.
• In multilingual emails, Optimize HTML size is tracked at the email level, not per locale: enabling it on any one locale applies it to all locales at publish time; to disable it, uncheck it on every locale.
• Removal of non-essential HTML comments during optimization is temporarily disabled as of July 10, 2026.
• The sizes shown in View proofs reflect the HTML template with Handlebars expressions evaluated at their minimum value, not the size of the final delivered email.

Terminology:

• Canonical name: Email action — Acronym: n/a — variants: email activity, email channel action
• Do not confuse: “Warnings” (recommendations/best practices; do not block testing or activation) ≠ “Errors” (must be resolved before testing or activating)
• Do not confuse: “Simulate content” (test variations with sample input data or AI auto-generation) ≠ “Simulate content (AEP profiles)” (preview with test profiles, send proofs, and check email rendering)

FAQ:

• Q: How do I create an email? — Add an Email action to a journey or a campaign, select or create an email configuration, then define the subject and body in the Email Designer.
• Q: Are the legacy native email/push/SMS journey activities still usable? — They are deprecated as of the March 2026 release, but existing journeys using them continue to work without changes and no migration is required.
• Q: Why can’t I test or activate my journey or campaign? — All error alerts (such as a missing subject line, an empty email version, or a deleted configuration) must be resolved first; warnings do not block testing or activation.
• Q: What does the Optimize HTML size option do, and is it automatic? — It compresses the email HTML at publication time by removing unnecessary whitespace and indentation, which helps avoid email clipping (some clients such as Gmail truncate messages over ~100 KB). It is not automatic — you must enable it manually.
• Q: How does Optimize HTML size behave for multilingual emails? — It is tracked at the email level, not per locale: enabling it on one locale applies it to all locales at publish time, and to disable it you must uncheck it on every locale.
• Q: How can I preview or test my email before sending? — Use Simulate content (sample input data or AI auto-generation), or Simulate content (AEP profiles) to preview with test profiles, send proofs, and check rendering; you can also validate content quality.