How to Use an AI Email Assistant With Apple Mail—Without a Plugin

You should not have to leave Apple Mail to get useful help with email. You also should not have to install a browser extension designed for a different inbox or grant software access to every message in your account.

An assistant with its own email address works across clients. You use the two gestures Apple Mail already supports: forward a thread or CC the assistant on a reply.

The assistant is a contact, not a plugin

Deck gives your assistant an address such as alex@agent.hellodeck.ai. Add it to Contacts if you like, then use it when a thread needs work.

• Forward when you want a summary, action list, comparison, or reply draft privately.
• CC when you want the assistant to receive the exact conversation you are sending.
• Email directly when you want to assign a task with attachments or supporting material.

Deck sees only the messages delivered to its address. It does not log into Apple Mail, iCloud Mail, or the mailbox behind the app, and it does not read conversations you did not share.

Start with a private forward

Forwarding is the safest way to learn the workflow because nobody else on the original thread sees the assistant address. Add an instruction above the forwarded conversation:

Summarize this thread in five bullets. Tell me what is decided, what is still open, who owes the next move, and every date mentioned. Then draft the reply I should send. Use only the thread, reply only to me, and do not contact the other participants.

The result comes back as an email. Review it in Apple Mail, edit the draft, and send the final response from your own account.

CC when the handoff should be visible

CCing the assistant can be useful when the team treats it like a colleague or shared operating address. Everyone can see exactly which conversation was shared.

The assistant still responds privately to you rather than replying to the whole thread. This matters when a draft, internal interpretation, or unresolved question should not reach customers or partners before review.

If the assistant does not need to be visible to external participants, forward instead. The workflow should match the relationship and your organization’s communication policy.

Ask for work, not generic summaries

The strongest instructions name the output. For example:

• “Extract the commitments, owners, and due dates.”
• “Compare this proposal with the requirements in the earlier email.”
• “Draft a reply that answers the three numbered questions.”
• “Turn this into a task list, with missing owners clearly marked.”
• “Give me a one-paragraph brief before tomorrow’s call.”

Apple Mail is simply where you send the request and receive the result. The value comes from giving the assistant a concrete job and enough selected context to complete it.

Keep approval in your inbox

An AI email assistant should make the next action easier without pretending it has your judgment. Check names, dates, attachments, prices, commitments, and anything sensitive before you reuse a result.

Deck does not send the drafted reply to other participants automatically. It returns the work to you, so the final communication still comes from the person accountable for it.

Use the same assistant across a team

The email-address model is not tied to one client. People using Apple Mail, Gmail, and Outlook can work with the same assistant. Enterprise customers can link multiple approved user addresses and use an assistant address on their own domain—assistant@yourcompany.com, for example—instead of the default @agent.hellodeck.ai address.

That makes the workflow portable across a mixed-email organization without asking everyone to adopt the same application.

See how the AI email assistant works, compare the existing Gmail and Outlook workflows, and read how to turn Gmail and Outlook email into next actions. The same CC-and-forward model applies from Apple Mail.

Get your Deck assistant and forward one Apple Mail thread you would otherwise have to reread before answering.