AgentMsgr email bounce, or your agent has no inbox? How to fix both

By the AgentMsgr team · Updated November 13, 2026 · 3 min read

This guide covers an AgentMsgr email bounce that pauses sending to your agent, an agent that doesn't have its own email inbox yet, and replies from your agent that never show up in the chat.

Why AgentMsgr paused sending to your agent

A bounce is when the agent's mail server sends an email back instead of delivering it. After three bounces, with the latest one a hard bounce (the server refused for good, not just for now), AgentMsgr pauses sending to that address.

You'll see it in two places. Under the text box: "Mail to [name] keeps bouncing, so sending is paused." with the reason for the last bounce. And in the agent's Details: "Sending paused: mail bounced [number] times. Last:" followed by the reason.

A message can also be held with one of these:

• "Mail to that agent bounced before, so Cloudflare is holding it."
• "The agent's mail server refused the email."

How to restart sending after a bounce

1. Open your agent's own platform and check the email address it actually uses.
2. If it matches what AgentMsgr has, tap The address is right, try again under the text box, or Try sending again in the agent's Details.
3. If the address is wrong, tap Delete [name] and add the agent again with the right address. Removing and re-adding an agent walks through it.

Any real email from the agent lifts the pause too, so if the agent writes to you first, sending starts again without a tap.

If your agent doesn't have an email inbox

Plenty of agents start without one. The setup chat checks for you and helps you set one up:

1. When the setup chat asks "First, does [agent] have its own email address yet?", answer No, not yet.
2. Not sure? The app's tip: "Easy way to check: ask [agent] "What's your email address?" in its app. If it gives you one, it has one."
3. Copy the walkthrough message it gives you and paste it into your agent.
4. When the agent asks for AgentMail's 6-digit code, give it that code.
5. When the agent tells you its new address, tap Done.

The walkthrough suggests AgentMail for every platform except Grok Bot, which uses its own address at mail.grokbot.com. A help card in the chat, "Here's some help: how to give it one, and which kind makes it answer fastest.", links to our step-by-step agent email guide, which has steps for each platform.

You can also skip email completely and connect the agent directly. AgentMsgr direct connection or email explains the difference.

The agent replied, but the reply isn't in the chat

AgentMsgr links a reply to your agent by the address the agent paired with. If the reply comes from a slightly different address, it can't tell they're the same. Common examples are a Gmail address written with dots, an address with a +tag, or a "send as" alias. Those replies land in Emails from unknown senders.

1. Open Emails from unknown senders.
2. Find the reply and tap It's this agent to link it to the right agent, or Add as new agent.

Mail that failed AgentMsgr's sender checks can't be linked this way. Those checks are there to catch fake senders.

Mail still bouncing? Send the bounce reason to hello@agentmsgr.com, or ask in the setup chat from the You sheet. Start free or text the demo room.

When to contact support

Email hello@agentmsgr.com if:

• an agent inbox you know works gets paused for bounces again right after you tap Try sending again, or
• your agent's replies show "failed the sender checks (possible fake)".

Copy the bounce reason from the agent's Details and say which inbox service the agent uses. Never send the agent's key or a setup message.

This guide describes the AgentMsgr app as of November 13, 2026. If something on your screen looks different, email hello@agentmsgr.com.

Agent email questions