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.
Productivity2,876th of 4,005 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 2874 |  Noveo | 3,170 | — | — |
| 2875 | 3,170 | — | 687places down | |
| 2876 | Postbox Services: Email Deliverability & Security ToolsThis page | 3,170 | — | 445places down |
| 2877 | 3,170 | — | 53places up | |
| 2878 | 3,170 | — | 309places down |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 |  Watch Any Video | 4,718,560 | 10,415 #607 | — |
| 2 | 4,208,811 | 13,413 #256 | — | |
| 3 |  Intuit Developer | 1,059,790 | 12,502 #339 | — |
| 4 |  Statz | 483,976 | 7,129 #1331 | 71places up |
| 5 | 483,162 | 7,827 #1124 | 563places up |
Developer tools989th of 1,310 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 987 |  JustDeploy | 3,170 | — | 687places down |
| 988 | 3,170 | — | 687places down | |
| 989 | Postbox Services: Email Deliverability & Security ToolsThis page | 3,170 | — | 445places down |
| 990 |  RedirHub | 3,170 | — | 315places up |
| 991 |  RegiaBI Charts | 3,170 | — | 557places down |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 |  Framer | 35,616,504 | 12,702 #72 | — |
| 2 | Intuit Developer | 1,059,790 | 12,502 #76 | — |
| 3 |  Etherscan | 450,704 | 13,335 #56 | 10places down |
| 4 | 262,839 | 7,229 #426 | 67places up | |
| 5 |  TEXT TO QUANT | 252,724 | 13,970 #45 | 26places down |
Data analytics2,103rd of 2,740 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 2101 |  Patrician.ch: Where to Live, Tax and Second Passports | 3,170 | — | 139places down |
| 2102 | 3,170 | — | 557places down | |
| 2103 | Postbox Services: Email Deliverability & Security ToolsThis page | 3,170 | — | 445places down |
| 2104 | 3,170 | — | — | |
| 2105 | 3,170 | — | 687places down |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 | 29,445,468 | 12,305 #156 | — | |
| 2 |  Netzero | 1,983,480 | 8,531 #622 | 3places up |
| 3 | 507,188 | 7,845 #770 | — | |
| 4 | Statz | 483,976 | 7,129 #943 | 71places up |
| 5 | 483,162 | 7,827 #778 | 563places up |
Sales and marketing1,286th of 1,696 by popularity · not ranked by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 1284 | 3,170 | — | 445places down | |
| 1285 |  Mes Immo - Mes VO | 3,170 | — | 687places down |
| 1286 | Postbox Services: Email Deliverability & Security ToolsThis page | 3,170 | — | 445places down |
| 1287 | 3,170 | — | — | |
| 1288 | RedirHub | 3,170 | — | 315places up |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 | Framer | 35,616,504 | 12,702 #120 | — |
| 2 | Watch Any Video | 4,718,560 | 10,415 #268 | — |
| 3 | 4,208,811 | 13,413 #93 | — | |
| 4 |  Bird | 235,514 | 14,588 #59 | 25places down |
| 5 |  Director's Lookbook | 218,042 | 8,397 #464 | — |
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