Borrowing it
Nothing to install: this file belongs to TommyBez/evex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/TommyBez/evex/main/.agents/skills/email-best-practices/SKILL.mdgit clone --depth 1 https://github.com/TommyBez/evexWrote 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/tommybez/evex/email-best-practices)<a href="https://agentmods.dev/skills/tommybez/evex/email-best-practices"><img src="https://agentmods.dev/badge/skills/tommybez/evex/email-best-practices/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/tommybez/evex/email-best-practices"><img src="https://agentmods.dev/badge/skills/tommybez/evex/email-best-practices.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 | $0.00075 | $0.00857 |
| Opus 5.5 | $0.00030 | $0.00343 |
| Sonnet 5.5 | $0.00015 | $0.00171 |
| Haiku 4.5 | $0.00007 | $0.00086 |
Grade A, and why
email-best-practices 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 1mo 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.
This is a copy
100% identical to email-best-practices — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Email Best Practices
Guidance for building deliverable, compliant, user-friendly emails.
Architecture Overview
[User] → [Email Form] → [Validation] → [Double Opt-In]
↓
[Consent Recorded]
↓
[Suppression Check] ←──────────────[Ready to Send]
↓
[Idempotent Send + Retry] ──────→ [Email API]
↓
[Webhook Events]
↓
┌────────┬────────┬─────────────┐
↓ ↓ ↓ ↓
Delivered Bounced Complained Opened/Clicked
↓ ↓
[Suppression List Updated]
↓
[List Hygiene Jobs]
Quick Reference
| Need to... | See |
|---|---|
| Set up SPF/DKIM/DMARC, fix spam issues | Deliverability |
| Build password reset, OTP, confirmations | Transactional Emails |
| Plan which emails your app needs | Transactional Email Catalog |
| Build newsletter signup, validate emails | Email Capture |
| Send newsletters, promotions | Marketing Emails |
| Ensure CAN-SPAM/GDPR/CASL compliance | Compliance |
| Decide transactional vs marketing | Email Types |
| Handle retries, idempotency, errors | Sending Reliability |
| Process delivery events, set up webhooks | Webhooks & Events |
| Manage bounces, complaints, suppression | List Management |
| Make emails accessible (screen readers, alt text, contrast) | Accessibility |
Start Here
What ships with it
11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/accessibility.md 9.3 KB
- references/compliance.md 4.1 KB
- references/deliverability.md 3.3 KB
- references/email-capture.md 3.4 KB
- references/email-types.md 5.7 KB
- references/list-management.md 4.5 KB
- references/marketing-emails.md 3.2 KB
- references/sending-reliability.md 4.7 KB
- references/transactional-email-catalog.md 10 KB
- references/transactional-emails.md 2.4 KB
- references/webhooks-events.md 4.2 KB
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.
- 1mo ago First seen · 74 lines · 75 tokens per session scan A f1b957138619
email-best-practices is a skill published in the GitHub repository TommyBez/evex (25 stars, last pushed 1mo ago), licensed MIT. It adds 75 tokens to every session and 857 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to email-best-practices, differing in 0 lines, and is treated as a copy.
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