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Head to head

SMTP vs Mailbox

Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.

SMTPio.github.ni-c/smtp-mcp
B
No reviews yet

MCP server that sends mail over SMTP, gated behind an allowlist and a human confirmation

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Mailboxio.github.psyb0t/mailbox
A
No reviews yet

Self-hosted MCP server for unified IMAP/SMTP mailbox access: read, list, and send email.

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The short version

Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. Both score close on the safety scan (83 and 88 out of 100).

 SMTPMailbox
User ratingNo reviews yetNo reviews yet
Safety gradeB83/100A88/100
AdoptionGrowingGrowing
GitHub stars04
Downloads / week44–
Runs whereYour machine (local)Your machine (local)
Gateway-readyNoNo
Tools7—
Write actions2—
Price per callFreeFree
LicenceMITWTFPL
Last release2026-09-162026-09-07
CategoryEmailEmail

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