Postbox Services
Postbox Consultancy Services v1.0.0
Email deliverability checks
From the developer
Declared capabilities
- Check email blacklists
- Grade spoofing exposure
- Trace URL redirects
Cost & access
This plugin does not sell products or process payments.
Declared limitations
- Sending email is not supported
- Delisting is not supported
- Changing DNS is not supported
Sources & dates
Developer declarations; not independently tested. Listing last checked Nov 14, 2026. Package observed Nov 14, 2026.
Description
From the marketplace listing
Run live email deliverability and security checks from ChatGPT and get answers from real lookups, each with a link to a full report. Check a domain or IP against email blacklists, grade a domain's spoofing and business email compromise exposure from SPF, DKIM and DMARC, and trace a link through every redirect to where it really goes. Test a real email: get a disposable address, send a message to it from your own system, and get a score out of 10 with a breakdown and fixes. You can also analyze a raw .eml file. Look up a domain's age and WHOIS details, check a BIMI record and logo, and grade how visible a website is to AI answer engines. No sign-in is needed. Postbox Services is run by Postbox Consultancy Services, an email deliverability consultancy.
Language: English · Automatically detected from descriptions.
Changes
No changes recorded yet. Follow this plugin to keep track of future changes.
First seen Nov 11, 2026. Last seen Nov 14, 2026.
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Keywords
Files & skills
File archives
Skill instructions
email-checks1.76 KB
--- name: email-checks description: Choose the right Postbox Services check for an email deliverability or email security question, and explain the result. Use when someone asks about blacklists, spoofing, spam tests, bounces, redirects, domain age, WHOIS, BIMI or AI discoverability. --- # Email checks Pick the check that answers the question, run it on the exact domain, IP or URL the person gave, and report what it found. Don't guess a result without running the check. | Question | Tool | |---|---| | Is this domain or IP on a blacklist? | `check_blacklist` | | Can someone spoof this domain? | `check_spoofability` | | Where does this link really go? | `trace_redirect` | | Why did my email go to spam? | `create_mailtest`, then `get_mailtest_result` | | Why did this email bounce? | `analyze_eml` | | How old is this domain? | `get_domain_age` | | Who is the registrar, and when does it expire? | `whois_lookup` | | Is this BIMI logo set up correctly? | `check_bimi` | | Can AI assistants find this site? | `check_ai_discoverability` | ## Running a mail test `create_mailtest` returns a disposable address. The person must send a real email to it from the system they want to test. Only then does `get_mailtest_result` have a score, so wait for them to confirm they sent it. ## Reading the results - A failed lookup says only that the lookup failed. It does not mean the domain is unregistered. - `check_bimi` does not verify the certificate or the DMARC policy. Use `check_spoofability` for DMARC. - If `check_ai_discoverability` says robots.txt could not be read, crawler access is unverified, so don't report the crawlers as allowed. Check the www host if the site lives there. - `analyze_eml` can't verify SPF, blacklists or reverse DNS from a file. Use a mail test for the full score.
Release notes
Initial release: email blacklist, spoofing, redirect, mail test, raw email, domain age, WHOIS, BIMI and AI discoverability checks.
Declared in the saved package. Remote tools may change independently.
Package details
Publisher declarations from the archived package. These are separate from our research and the live service's terms.
- Package author
- Postbox Consultancy Services
- Keywords
- See keywords
- Declared availability
- No country restrictions declaredDeclared regions; live availability may differ.
- Commerce declaration
- Does not support commerceThis does not establish whether access is free or paid.
- Review scenarios
- 5 positive · 3 negativeScenario counts, not test results.
Declared capabilities
- Check email blacklists
- Grade spoofing exposure
- Trace URL redirects
- Run an email deliverability test
- Analyze a raw email file
- Look up domain age and WHOIS
- Check a BIMI record and logo
- Grade AI discoverability
Package observed Nov 14, 2026.
Technical details
- First seen
- Nov 11, 2026 · 12:00 UTC
- Last seen
- Nov 14, 2026 · 00:00 UTC
- Collection status
- Collected
plugin_asdk_app_6aecf2f5e6dc8191acc60f34ea006120
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