Mail7 Email Validation vs Email MCP
A side-by-side look at the Mail7 Email Validation and Email MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Mail7 Email Validation for communication work as a local process; choose Email MCP for communication as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Mail7 Email Validation when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
MAIL7_API_KEY, MAIL7_BASE_URL. - You want tools like
validate_email, validate_emails, check_domain.
Choose Email MCP when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: other.
- You want tools like
email_list_accounts, email_add_account, email_remove_account.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 56/100 · Good | 68/100 · Great |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | other |
| Pricing | Not declared | Free |
| Required env vars | MAIL7_API_KEYMAIL7_BASE_URL | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 26 |
| Directory activity | 2 views 0 installs 0 upvotes | 8 views 0 installs 0 upvotes |
| Tools | 4 | 33 |
| Full listing | View Mail7 Email Validation | View Email MCP |
Tools & capabilities
Mail7 Email Validation tools 4
validate_emailCheck whether a single email address is deliverable: syntax, domain MX records, disposable-domain database and a live SMTP mailbox probe. Status is one of "Valid", "Not Valid", "Unknown". Unknown means the mailbox could NOT be checked (catch-all domain, greylisting, blocked SMTP port) - it is NOT a bad address. Never delete, reject or report Unknown addresses as invalid; present them separately and let the user decide. Use validate_emails instead when you have more than one address.validate_emailsCheck up to 50 email addresses in one call and get a per-address verdict plus a summary. Status is one of "Valid", "Not Valid", "Unknown". Unknown means the mailbox could NOT be checked (catch-all domain, greylisting, blocked SMTP port) - it is NOT a bad address. Never delete, reject or report Unknown addresses as invalid; present them separately and let the user decide. Requires MAIL7_API_KEY (anonymous callers get a 25-address free sample only). Each address takes a few seconds of real SMTP work, so this call is slow by nature: for a longer list, split it and call this tool repeatedly with the next 50 addresses. Never run two calls in parallel - the API serialises one bulk job per client and the second call fails.check_domainAudit a domain's email setup in one call: MX records, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, DNSSEC and BIMI, graded A-F with a fix for every problem found. Use this to answer "can this domain send and receive mail" or "why do our messages land in spam". Takes a domain (example.com), not an email address. The default answer summarises every section; pass `section` to get the full records and findings of one of them.check_spfFetch and analyse the SPF record of a domain: the raw record, its mechanisms, lookup count and common misconfigurations. Use check_domain instead when the question is about overall deliverability rather than SPF specifically.
Email MCP tools 33
email_list_accountsList all configured email accounts and their connection statusemail_add_accountAdd a new IMAP or iCloud email account (Gmail and Outlook require the setup wizard for OAuth)email_remove_accountRemove an email account: deletes its stored credentials, revokes the Google grant for Gmail accounts, and removes Outlook tokens from the local token cache. The result reports whether provider-side revocation succeeded.email_test_accountTest an email account connectionemail_list_foldersList all email folders for an accountemail_searchSearch emails with filters. By default returns compact results without full body content to save context. Set returnBody=true to include full email bodies.email_getGet a single email by IDemail_get_threadGet an email thread by thread IDemail_get_attachmentGet an email attachment by ID, returns base64 encoded dataemail_save_attachmentDownload an email attachment and save it directly to disk, returning metadata only (no base64 in the response) — avoids paying the token cost of round-tripping large attachments through the calling model. outputPath is relative to a fixed downloads directory (/home/user/.email-mcp/downloads, override with EMAIL_MCP_DOWNLOADS_DIR) and cannot escape it.email_sendSend a new emailemail_replyReply to an existing email- +21 more on the listing page
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Mail7 Email Validation
{
"mcpServers": {
"mail7-email-validation": {
"command": "npx",
"args": [
"-y",
"mail7-mcp"
],
"env": {
"MAIL7_API_KEY": "YOUR_MAIL7_API_KEY_HERE",
"MAIL7_BASE_URL": "YOUR_MAIL7_BASE_URL_HERE"
}
}
}
}
Email MCP
{
"mcpServers": {
"marlinjai-email-mcp": {
"command": "npx",
"args": [
"-y",
"@marlinjai/email-mcp"
]
}
}
}
Frequently asked questions
Mail7 Email Validation is categorized under Communication and uses a local stdio subprocess. Email MCP belongs to Communication and uses a local stdio subprocess. Pick Mail7 Email Validation for communication work and Email MCP for communication.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Mail7 Email Validation has no declared pricing — check the project's own site. Email MCP is listed as free. Auth: other. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add mail7-email-validation and marlinjai-email-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Mail7 Email Validation has a quality signal of 56/100 (Good) with 2 views, 0 installs and 0 GitHub stars. Email MCP has 68/100 (Great) with 8 views, 0 installs and 26 GitHub stars.