Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Misar-AI/misarmail-mcp --skill setup-sending-domaingit clone --depth 1 https://github.com/Misar-AI/misarmail-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/misar-ai/misarmail-mcp/setup-sending-domain)<a href="https://agentmods.dev/skills/misar-ai/misarmail-mcp/setup-sending-domain"><img src="https://agentmods.dev/badge/skills/misar-ai/misarmail-mcp/setup-sending-domain/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/misar-ai/misarmail-mcp/setup-sending-domain"><img src="https://agentmods.dev/badge/skills/misar-ai/misarmail-mcp/setup-sending-domain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.00398 |
| Opus 5 | $0.00024 | $0.00199 |
| Sonnet 5 | $0.00010 | $0.00080 |
| Haiku 4.5 | $0.00005 | $0.00040 |
Grade A, and why
setup-sending-domain scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Set up a sending domain
1. Add it
add_domain returns the DNS records to publish. Give the user the exact record
type, host, and value — a paraphrase produces a broken record.
2. Wait, then verify
verify_domain re-checks DNS. Propagation takes minutes to 48 hours, so a
failure right after publishing is expected rather than an error. Say that
instead of letting the user think something is wrong.
check_dmarc shows what is actually resolving publicly, which is the fastest
way to spot a record pasted into the wrong host (a very common mistake:
_dmarc.example.com published as _dmarc.example.com.example.com).
3. Warm up before volume
get_warmup_status — a new domain has no reputation. Ramping gradually is what
separates a domain that lands in the inbox from one that lands in spam
permanently. Do not let a user send a large first campaign from a brand-new
domain without flagging the risk.
DMARC policy
Start at p=none (monitor only), then move to quarantine and finally
reject once check_dmarc shows SPF and DKIM aligned and passing. Jumping
straight to p=reject before alignment is confirmed silently blackholes
legitimate mail.
Inbound
configure_inbound_domain routes replies into the unified inbox and returns
the MX record to publish. Use a subdomain (reply.example.com) so it cannot
interfere with the organisation's primary mail.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 42 lines · 49 tokens per session scan A 87b838a8bf63
setup-sending-domain is a skill published in the GitHub repository Misar-AI/misarmail-mcp (1 stars, last pushed 2d ago), licensed MIT. It adds 49 tokens to every session and 398 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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