{"id":"stevenolen-mailgun-smtp-server","name":"mailgun-smtp-server","homepage":"https://hub.docker.com/r/stevenolen/mailgun-smtp-server","repo_url":"https://hub.docker.com/r/stevenolen/mailgun-smtp-server","category":"infrastructure","subcategories":[],"tags":["email","smtp","mailgun","relay","integration","infrastructure"],"what_it_does":"mailgun-smtp-server likely provides an SMTP server implementation that forwards incoming emails through Mailgun (acting as a local SMTP relay compatible with Mailgun’s requirements).","use_cases":["Receive outbound email from an application using SMTP and deliver through Mailgun","Simplify legacy systems that can only speak SMTP","Centralize email delivery control, logging, and forwarding via Mailgun"],"not_for":["Receiving inbound email from Mailgun to your server (webhooks/IMAP are not implied)","Highly regulated environments without clear TLS/auth configuration details","Use cases requiring a fully featured Mail Transfer Agent beyond SMTP-to-Mailgun forwarding"],"best_when":"You need an SMTP-compatible entry point that relays messages to Mailgun, and you can configure the server and credentials securely.","avoid_when":"You cannot verify the server’s TLS/auth/error handling behavior or cannot operate/manage an SMTP service safely.","alternatives":["Mailgun API directly (HTTP)","Mailgun SMTP integration via a managed relay (if available)","Using a generic SMTP relay service (e.g., Postfix/SES/other providers) with provider credentials"],"af_score":23.8,"security_score":38.5,"reliability_score":5.0,"package_type":"mcp_server","discovery_source":["docker_mcp"],"priority":"low","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-04-04T21:25:42.905039+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":["SMTP AUTH (implied by being an SMTP server)","Mailgun credentials for forwarding (API key / SMTP credentials depending on implementation)"],"oauth":false,"scopes":false,"notes":"Auth method details (SMTP AUTH mechanism, Mailgun credential type, how credentials are stored) are not provided in the prompt, so these are inferred from the package name/typical patterns."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":"No pricing information is included for the repository/package itself; Mailgun usage costs (if any) would be governed by the Mailgun account."},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":23.8,"security_score":38.5,"reliability_score":5.0,"mcp_server_quality":0.0,"documentation_accuracy":30.0,"error_message_quality":0.0,"error_message_notes":null,"auth_complexity":40.0,"rate_limit_clarity":0.0,"tls_enforcement":40.0,"auth_strength":50.0,"scope_granularity":20.0,"dependency_hygiene":40.0,"secret_handling":40.0,"security_notes":"Security depends heavily on implementation details (TLS requirement, SMTP AUTH mechanisms, credential storage/rotation, logging of message headers/content). No concrete evidence was provided in the prompt.","uptime_documented":0.0,"version_stability":0.0,"breaking_changes_history":0.0,"error_recovery":20.0,"idempotency_support":"false","idempotency_notes":null,"pagination_style":"none","retry_guidance_documented":false,"known_agent_gotchas":["SMTP servers often require correct TLS configuration and allow/deny rules; missing guidance can cause delivery failures.","Email sending is not naturally idempotent; retries can lead to duplicate messages unless deduplication is implemented.","Agents may treat SMTP as REST-like; without explicit protocol/error semantics, automated retries may be unsafe."]}}