Let Claude draft the reply to a customer email in Slack

If customer email lands in a Slack thread, you can ask Claude in that same thread to draft the answer. A teammate reads the draft, edits it, and posts the reply that goes to the customer. Nothing reaches the customer until a person sends it.

This page shows how that works with RelayMail, which we make, and Claude Tag, Anthropic's Claude app for Slack.

How it works

RelayMail posts each email you forward to it as a new thread in your Slack channel. In that thread, start a message with @Claude and ask for a draft, for example: "@Claude draft a short, friendly reply to this customer." Anthropic's help page for Claude Tag says you tag @Claude in a channel and follow along as it works in the thread, and that the exchange stays visible to everyone in the channel.

RelayMail treats a thread message that starts with a mention as a note to your team, so your question to Claude is never emailed to the customer. Claude's answer is posted by the Claude app, and RelayMail never emails messages posted by apps. Only a reply your teammate writes and posts in the thread goes out as an email.

Sending the reply

Read the draft, change what needs changing, and post your reply in the same thread without starting it with a mention. RelayMail sends it to the customer as a normal email, and their answer comes back into the same thread, where you can ask Claude again.

Start internal notes with // if you want to talk to a teammate in the thread without emailing the customer.

What you need

Claude Tag is on Claude's Team and Enterprise plans, in beta, according to Anthropic. It replaced the earlier Claude app for Slack on August 3, 2026. Someone with permission to add apps installs it in your workspace.

RelayMail starts at $15 a month per inbox with a 14-day trial, and any number of teammates can reply. It works on free and paid Slack workspaces.

When something else is the better pick

×You want an AI assistant to answer customers on its own, without a person reviewing each reply.
×Your company's rules keep customer email out of AI tools.

When RelayMail is the better pick

✓You want Claude to help with the wording while a person decides what the customer receives.
✓Your team already discusses customer email in Slack and wants drafts in the same thread.

Questions

Will RelayMail email my question to Claude?

No. A thread message that starts with a mention, like @Claude, stays in Slack as a team note and is never emailed.

Will RelayMail email Claude's draft to the customer?

No. RelayMail never emails messages posted by apps, and Claude posts as an app. A teammate has to post the reply themselves.

Which Claude plan do I need?

Anthropic lists Claude Tag on its Team and Enterprise plans, in beta.

Try RelayMail on your real inbox for 14 days

$0 today, then from $15/month per inbox. Cancel in Billing before day 14 and you pay nothing.

See plans and start the trial

Updated 2026-11-11. How we check these pages. Sources: