{"id":"reachfive-fake-smtp-server","name":"fake-smtp-server","homepage":"https://hub.docker.com/r/reachfive/fake-smtp-server","repo_url":"https://hub.docker.com/r/reachfive/fake-smtp-server","category":"testing","subcategories":[],"tags":["smtp","email","testing","devtools","mock-server","integration"],"what_it_does":"fake-smtp-server provides a local/stub SMTP server that can accept email from applications/tests without actually delivering it to real recipients. Typical usage is capturing inbound SMTP traffic for development, integration testing, and demonstrations.","use_cases":["Integration tests for services that send email via SMTP","Local development environments that need email flows without real delivery","Capturing/verifying SMTP message contents during CI tests","E2E testing of notification flows (password reset, confirmations, alerts) without external dependencies"],"not_for":["Production email delivery","Compliance-sensitive mail operations that require real outbound delivery guarantees","High-scale message routing/relaying across multiple domains","Use as a security boundary against untrusted senders"],"best_when":"Used only in controlled test/dev environments where inbound SMTP traffic is trusted and you want deterministic capture of messages.","avoid_when":"Avoid exposing it to the public internet or using it as a drop-in replacement for real SMTP delivery in production workflows.","alternatives":["MailHog (SMTP capture + web UI)","Mailpit (SMTP capture + UI)","smtp4dev (SMTP/console capture)","LocalStack-like email mocks or test doubles specific to your framework"],"af_score":35.0,"security_score":22.0,"reliability_score":30.0,"package_type":"mcp_server","discovery_source":["docker_mcp"],"priority":"low","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-04-04T19:40:54.851798+00:00","interface":{"has_rest_api":false,"has_graphql":false,"has_grpc":false,"has_mcp_server":false,"mcp_server_url":null,"has_sdk":false,"sdk_languages":[],"openapi_spec_url":null,"webhooks":false},"auth":{"methods":[],"oauth":false,"scopes":false,"notes":"No auth mechanisms are typically implied for a fake SMTP server; any access control is implementation-specific and not assessable from the provided input."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":"Pricing not assessable from provided information; most fake/mock servers are free/open-source."},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":35.0,"security_score":22.0,"reliability_score":30.0,"mcp_server_quality":0.0,"documentation_accuracy":20.0,"error_message_quality":0.0,"error_message_notes":null,"auth_complexity":100.0,"rate_limit_clarity":0.0,"tls_enforcement":20.0,"auth_strength":0.0,"scope_granularity":0.0,"dependency_hygiene":40.0,"secret_handling":60.0,"security_notes":"As a test SMTP server, it may accept unauthenticated connections and capture email content (which may include sensitive data) into logs/artifacts. If STARTTLS/TLS and access controls are not clearly implemented, it should not be exposed beyond trusted networks.","uptime_documented":0.0,"version_stability":50.0,"breaking_changes_history":40.0,"error_recovery":30.0,"idempotency_support":"false","idempotency_notes":null,"pagination_style":"none","retry_guidance_documented":false,"known_agent_gotchas":["No standardized API contract (likely SMTP-only); agents may need to parse captured messages from logs/UI/artifacts.","If message capture is file/log based, automated agents must locate/parse outputs deterministically.","Fake servers may not fully implement all SMTP edge cases (AUTH/DSN/STARTTLS behavior), so integration tests should not assume strict parity with real MTAs."]}}