Email Deliverability Agent with Hermes

Hermes reasons capably on an open model foundation, and the judgement this template needs is narrow but real: is this one dead address, or the first sign of a reputation problem. Several recipients at the same domain failing together points one way and a single typo points the other. The CRM write stays fenced to the fields your rules name.
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Free to start · guided setup · switch agents any time.

Live demo

Watch it work before it's live

Run a staged conversation — no account needed. The agent handles it for real while a simulated world answers its tool calls; nothing touches real accounts, and nothing is actually sent.

Maartje de Vries

mg.zorgflow.nl invoice remindersm.devries@thuiszorg-lindehof.nl

550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos. First permanent failure for this address, sent by the July invoice reminder campaign. The contact opened eleven emails before this and last clicked on 14 June.

What you'll need

Set up in minutes

Using this template drops you into a guided setup. It asks exactly this, nothing else:

  1. Connect Mailgun

    One sign-in. The agent acts through your account, scoped to what this template uses.

  2. Connect HubSpot

    One sign-in. The agent acts through your account, scoped to what this template uses.

  3. Connect Slack

    One sign-in. The agent acts through your account, scoped to what this template uses.

  4. List hygiene rules

    What a hard bounced address should become in HubSpot: which field to set, to which value, and where the bounce details get written. The agent only ever makes the changes this names.

  5. Alert criteria

    Which bounces are worth interrupting someone for, for example a paying customer domain, a VIP account, or more than five bounces on one domain in a day. Everything else stays silent.

  6. Runs on Hermes

    Preselected for this page — connect your Hermes account during setup, or switch to NoClick's built-in models with one click.

  7. Watch it handle a test run

    A staged conversation against a simulated world — then it’s live.

A considered pairing

Why Hermes for this agent

Pattern beats single record

Recognising a domain-level failure means reading several bounces together rather than classifying one in isolation.

Escalation instead of action

When it looks like a blocklisting, the correct move is to change nothing and hand a person the evidence. That restraint is the behaviour worth verifying.

Good to know

Before you fork

Can an open model be trusted with CRM writes?

The writes are constrained to fields you name, on a contact matched exactly by the bounced address, with a hard stop when zero or several contacts match. That containment makes the harness choice a smaller question than it first appears. Run Shared Inbox Rejection, where two contacts share one address and the correct answer is to change nothing.

Other editions

Run it with a different agent

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Make it yours

Put Email Deliverability Agent to work on Hermes.

Free to start. Guided setup, a staged test run, and a workflow you can change at every step.