Postbox Services: Email Deliverability & Security Tools
Claude connectorCommunityAsk your AI: is my domain or IP blacklisted? Run a spam test, check SPF/DKIM/DMARC, grade spoofing, trace redirects, look up domain age & W…
Claude can run real email deliverability and security checks on demand. Ask the questions people actually type (about blacklists, email spam tests, link tracing) and get answers from a live check, each with a link to the full report:
- "Is my IP blacklisted?" / "Am I on a blacklist?" - check any IP against 24 DNSBLs (Spamhaus ZEN, Barracuda, SpamCop and more).
- "Is my domain blacklisted?" - check a domain against the domain blacklists (Spamhaus DBL, SURBL, URIBL).
- "Can someone spoof my domain?" - grade spoofing / BEC exposure A-F from SPF, DKIM and DMARC.
- "Why did my email go to spam?" / "Run a spam test" - a full deliverability audit (SPF, DKIM, DMARC alignment, blacklists, reverse DNS, content) on a real message you send.
- "Why did this email bounce?" - analyze a raw .eml file's headers and content.
- "Where does this link really go?" - trace a URL through every redirect hop to its true destination, with phishing flags.
- "How old is this domain?" and "Who owns it?" - domain age and WHOIS.
- Tools
- 8
exposed by this connector
Movement
From our daily snapshots over the last 30 days.
Rank by popularity
Rank by trending score
Popularity score
Trending score
In its categories
How this connector compares with others in the same category. Positions are counted within the category, not across the whole directory.
Productivity2,599th of 4,952 by popularity · not ranked by trending score
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 |  Intuit QuickBooks Labs | 57,784,459 | 13,209 #289 | — |
| 2 |  Adspirer Social Ads | 30,557,087 | 14,248 #216 | — |
| 3 | 15,667,540 | 15,307 #141 | 1places down | |
| 4 |  Hevy | 1,955,298 | 8,690 #1014 | — |
| 5 | 1,658,113 | 8,969 #954 | 5places up |
Developer tools889th of 1,608 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 887 |  MADLAB // Publishing | 4,644 | 13,674 #345 | — |
| 888 | 4,644 | — | 155places down | |
| 889 | Postbox Services: Email Deliverability & Security ToolsThis page | 4,644 | — | 209places down |
| 890 |  RolIA | 4,644 | 34,594 #90 | 314places up |
| 891 | 4,585 | — | — |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 |  Framer | 34,158,649 | 14,826 #36 | 2places down |
| 2 |  Claude Academy | 465,374 | 15,594 #19 | 35places up |
| 3 |  LaTeX Compiler | 400,664 | 9,014 #294 | — |
| 4 |  Exness | 305,009 | 8,468 #345 | — |
| 5 |  Intuit Developer | 186,229 | 13,415 #63 | 50places down |
Data analytics1,908th of 3,282 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 1906 | 4,644 | 57,347 #62 | 16places down | |
| 1907 | 4,644 | — | 155places down | |
| 1908 | Postbox Services: Email Deliverability & Security ToolsThis page | 4,644 | — | 209places down |
| 1909 | 4,644 | — | 155places down | |
| 1910 | RolIA | 4,644 | 34,594 #161 | 314places up |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 | 42,345,503 | 13,242 #116 | 0 | |
| 2 | Adspirer Social Ads | 30,557,087 | 14,248 #67 | — |
| 3 | Hevy | 1,955,298 | 8,690 #672 | — |
| 4 | 714,596 | 7,435 #995 | — | |
| 5 | 502,891 | 7,877 #877 | 10places up |
Sales and marketing1,169th of 2,043 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 1167 | 4,644 | — | 91places down | |
| 1168 | 4,644 | 8,453 #767 | 330places down | |
| 1169 | Postbox Services: Email Deliverability & Security ToolsThis page | 4,644 | — | 209places down |
| 1170 | 4,644 | — | 155places down | |
| 1171 | 4,644 | 14,802 #528 | 367places down |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 | Framer | 34,158,649 | 14,826 #60 | 2places down |
| 2 | Adspirer Social Ads | 30,557,087 | 14,248 #78 | — |
| 3 | 15,667,540 | 15,307 #45 | 1places down | |
| 4 | 507,188 | 7,033 #724 | — | |
| 5 | 502,891 | 7,877 #587 | 10places up |
Tools
- analyze_eml
- check_blacklist
- check_spoofability
- create_mailtest
- get_domain_age
- get_mailtest_result
- trace_redirect
- whois_lookup
- Made by
- Postbox Consultancy Services · Website
- Sign-in
- Not required
- Connector URL
- https://mcp.postboxservices.com/mcp
- Transport
- Streamable HTTP
- Works with
- Claude, Claude API, Claude Code, Claude Desktop
- Added
- September 28, 2026
- More info
- Sponsorship
- Promote this connector