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Head to head

Agent Email List — Free SMTP Relay for AI Agents 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.

Agent Email List — Free SMTP Relay for AI Agentscom.agentemaillist.ai/free-transactional-email-smtp-relay
B
No reviews yet

Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.

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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. The safety scan favours Mailbox (88/100 against 80). Agent Email List — Free SMTP Relay for AI Agents is hosted and callable through the gateway; Mailbox runs on your own machine.

 Agent Email List — Free SMTP Relay for AI AgentsMailbox
User ratingNo reviews yetNo reviews yet
Safety gradeB80/100A88/100
AdoptionGrowingGrowing
GitHub stars14
Downloads / week
Runs whereHosted (remote)Your machine (local)
Gateway-readyYesNo
Tools8
Write actions2
Price per callFreeFree
LicenceWTFPL
Last release2026-09-182026-09-07
CategoryEmailEmail

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