Proton Mail (unofficial)
Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP
Verdict not yet evaluated for this tool. The hybrid eval runs adversarial cases first; coverage rolls out as the corpus expands (15 of 150 labels to graduation). Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: hybrid eval, four-state verdict, honest limits.
PROTONMAIL_USERNAMEYour Proton Mail email address
PROTONMAIL_PASSWORDYour Proton Mail SMTP password (not your login password; generate one in Proton settings)
PROTONMAIL_HOSTSMTP host
PROTONMAIL_PORTSMTP port
PROTONMAIL_SECUREUse TLS for SMTP (true for port 465)
IMAP_HOSTProton Mail Bridge IMAP host (required for read/search tools)
IMAP_PORTProton Mail Bridge IMAP port
IMAP_SECUREUse TLS for IMAP
IMAP_USERNAMEProton Mail Bridge username (falls back to PROTONMAIL_USERNAME)
IMAP_PASSWORDProton Mail Bridge password (falls back to PROTONMAIL_PASSWORD)
READONLYDisable all mutating tools (send, move, delete, flags, labels, bulk ops, folder/label management)
RESTRICT_OUTBOUND_TO_SELFRefuse live sends to any recipient other than PROTONMAIL_USERNAME (for throwaway/QA accounts)
ALLOW_FILE_DOWNLOAD_DIRAllowlist directory enabling download_attachment.saveTo; when unset, attachments return as inline base64
ALLOW_EMPTY_FOLDERRegister the empty_folder tool (not recommended)
DEBUGEnable verbose logging to stderr
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