Buyer’s Guide - August 2026

The 10 best Postfix monitoring tools, ranked by how fast they catch a stuck queue

Q: Is there a free Postfix monitoring tool?

Several open-source options exist: the Netdata agent, Zabbix, Nagios Core, Monit, and postfix_exporter are all open source and self-hosted. Open source means you run and operate it yourself, so the operating cost is real even when the license is not. Netdata additionally offers a free Cloud tier for up to 5 nodes, with a paid per-node path beyond that.

Postfix fails quietly. The server stays up, CPU looks fine, and mail piles up in the deferred queue while nobody notices. This ranking grades ten tools on the things that actually decide whether you catch that: Postfix-specific depth, collection speed, log correlation, and what the bill looks like for a small mail fleet. Netdata leads on per-second collection, built-in queue metrics, and searchable mail logs in one agent. The rest earn their place for specific environments.

Start with Netdata (free) Jump to rankings

Why this list exists

Postfix monitoring is a different problem from general infrastructure monitoring, and most buyers pick the wrong tool because they do not see why. A crashed process is easy to catch. Postfix rarely crashes. It sits there looking healthy while the deferred queue grows because a recipient server is throttling you, DNS is failing, or a TLS handshake broke after a certificate change. Your host metrics stay green the whole time.

The common mistake is buying a general monitoring platform and assuming that one queue-length gauge is enough. Queue length catches the symptom. Diagnosing the cause requires mail log correlation and delivery statistics: delivered, bounced, rejected, deferred, with reason codes. Tools that only chart queue depth tell you something is wrong. Tools that also expose maillog tell you why.

Three dimensions decide the outcome:

Postfix-specific depth. Does the tool read the queue (mailq or postqueue -p) and the delivery statistics, or does it just watch the process? SolarWinds SAM and postfix_exporter parse maillog outcomes; several general platforms stop at one gauge.
Collection granularity. A queue can fill and drain inside a five-minute plugin cycle. Per-second to 10-second collection catches transient spikes; 1-minute to 5-minute polling misses them entirely.
Log correlation. Can you jump from a queue spike to the maillog entries behind it in the same tool, or are you SSHing to the box anyway?

One note on pricing: we do not quote competitor list prices. Vendor pricing pages change, list prices rarely match negotiated rates, and a dollar figure copied from a blog post is how teams get surprised later. Instead, each card describes the pricing shape - per-node, per-service, per-GB, per-monitor - and what makes the bill grow. Every card links the vendor’s own pricing page so you can check current numbers. For operator-level detail on Postfix itself, the Postfix guide section has hands-on references.

The shortlist covers the tools mail admins actually encounter when they search this problem: dedicated queue collectors, general monitoring platforms with Postfix integrations, SaaS observability products with mail log ingestion, and one lightweight supervisor included as a baseline. One candidate was excluded because its project is archived and unmaintained.

The criteria weight Postfix-specific depth and collection granularity heaviest, because those two decide whether a tool catches a stuck queue in time and tells you why it happened. Deployment overhead, alerting quality, log correlation, and pricing predictability follow. Every vendor claim below is sourced from official documentation, integration pages, or project repositories listed in the sources.

Tester credit

Compiled by the Netdata team - Updated August 12, 2026

Sources verified

Scoring criteria

Postfix-specific depth 25%
Queue metrics, maillog delivery statistics, and service health versus generic host metrics
Collection granularity 20%
Per-second to 10-second collection catches transient queue spikes; 5-minute cycles miss them
Deployment and operational overhead 15%
Components to run and configuration burden for a mail server
Alerting and anomaly detection 15%
Queue-growth thresholds and false-positive handling on normal traffic spikes
Log and correlation capability 10%
Searching maillog or journal alongside queue metrics
Pricing predictability 10%
Pricing shape and what makes the bill grow for a small mail fleet
Ecosystem and maintenance 5%
Vendor-maintained versus community integrations; project activity

Vendor 01 / 10 · #netdata

Netdata

Real-time, per-second infrastructure monitoring with a built-in Postfix queue collector, auto-discovered journald mail log exploration, and ML anomaly detection in one lightweight agent.

Best for

Mail admins who want per-second queue visibility plus host-level context (CPU, disk, network) without assembling a multi-component stack
Teams that want Postfix queue metrics, mail log exploration, and anomaly detection in one UI
Small fleets that need a free tier and a clear per-node upgrade path

Pricing

Per-node pricing: Netdata Cloud Business starts at $4.50/node/month billed annually, with the per-node price decreasing as node count grows
Free Cloud Community tier for up to 5 nodes, non-commercial
Open-source agent (GPLv3+), self-hosted: you run and operate it
Homelab plan at $90/year for unlimited nodes

Pros

Postfix collector runs postqueue -p every 10 seconds by default (configurable), reporting queue message count and queue size in KiB
Auto-discovers systemd-journal logs, so Postfix mail logs on modern distros are searchable and filterable without pipeline configuration
Per-second metric collection across 800+ integrations, with machine-learning anomaly detection on every metric
Single agent covers queue metrics, host context, and logs: no server, database, exporter, and dashboard stack to assemble
Open-source agent (GPLv3+) with a free Cloud tier for up to 5 nodes

Where teams pair it

The collector exposes two queue metrics (message count and size in KiB); it does not parse maillog delivery, bounce, and reject statistics out of the box the way SolarWinds SAM or postfix_exporter do. Teams that need per-outcome counts pair journald log exploration or a log-parsing pipeline with it.
No Postfix-specific alert templates ship with the collector, so you define queue-growth thresholds yourself. The ML anomaly detection covers baseline behavior in the meantime.

Verdict

Netdata leads this list because it is the only option here that combines fast queue collection with the two things you need when the queue grows: full host context and searchable mail logs, in one agent you install in a minute. The 10-second queue polling is the fastest default of any tool reviewed, and the auto-discovered journald logs mean you go from queue spike to maillog entries without leaving the UI or configuring a log pipeline. The honest caveat: it charts queue depth and size but does not count delivered, bounced, and rejected messages per-outcome the way SolarWinds SAM or postfix_exporter do. For most mail fleets the free Cloud tier covers the whole deployment, and the per-node path beyond that stays predictable.

Start free -> Postfix monitoring guide ->

Vendor 02 / 10 · #zabbix

Zabbix

Open-source enterprise monitoring platform with community-maintained Postfix templates for queue length, mail statistics, and service status.

Best for

Enterprises that want a self-hosted, all-in-one platform with unlimited hosts and no per-node license fees
Teams already standardized on Zabbix that need Postfix queue checks alongside the rest of their infrastructure

Pricing

Open source (AGPLv3), self-hosted: you run and operate it, with no license fee and unlimited hosts
Optional paid support subscriptions priced by support coverage and number of Zabbix servers or proxies, not by host count
Zabbix Cloud is a hosted option with its own subscription

Pros

Official Postfix integration page lists multiple community templates covering queue length, mail statistics, and service status via zabbix_sender and scripts
Unlimited hosts, metrics, and users in the open-source edition; scales to very large environments
Built-in alerting, anomaly detection, and long-term storage with no per-metric cost
AGPLv3 open source with optional SLA-backed support subscriptions

Cons

Postfix monitoring relies on community templates of varying quality rather than a vendor-maintained integration
Default polling intervals are typically 1 minute or longer; catching short queue spikes requires custom item configuration
Requires operating a Zabbix server, database, and frontend: significant admin overhead for a single mail server

Verdict

Zabbix is the strongest self-hosted general platform on this list. If you already run it, adding Postfix queue checks through community templates is a natural move, and the economics are hard to beat at scale: unlimited hosts, no per-node fee, mature alerting. The trade-offs are real, though. The Postfix integration is community-maintained, so template quality varies, and the default 1-minute polling cadence will miss a queue that spikes and drains inside the interval unless you tune item intervals yourself. For a single mail server, running the full Zabbix server, database, and frontend stack is a lot of overhead for one queue gauge.

Read full Netdata vs Zabbix -> Zabbix pricing ->

Vendor 03 / 10 · #prometheus-postfix-exporter

Prometheus + postfix_exporter

Open-source metrics pipeline pairing Prometheus with the Kumina postfix_exporter for queue-size and message-age histograms plus log-derived delivery counters.

Best for

Teams already running Prometheus and Grafana who want Postfix queue metrics in their existing dashboards
SRE-minded shops that prefer pull-based metrics and PromQL alerting

Pricing

Open source, self-hosted: you run and operate Prometheus, the exporter, and Grafana if you use it
Cost grows with TSDB storage, retention, and the infrastructure you run it on

Pros

Exporter reads the Postfix showq UNIX socket, producing histograms of message size and age in the queue
Also parses Postfix log events (systemd journal, Docker logs, or log file) for counters of deliveries, bounces, and rejects
Community Grafana dashboard (ID 10013) renders the exporter metrics across multiple mail servers
Apache-2.0 licensed exporter; pairs with any Prometheus-compatible backend

Cons

Exporter is lightly maintained: last release v0.3.0 in October 2021 and last commit October 2022, so you may need to build or patch it yourself
Requires assembling and operating Prometheus, the exporter, and a dashboard tool: no out-of-the-box UI or alerting engine
Queue metrics are histograms, so alerting on exact queue counts requires understanding PromQL histogram semantics

Verdict

For a team already living in Prometheus and Grafana, this is the best DIY fit on the list. The postfix_exporter gives you something most tools here do not: queue message-age histograms plus log-derived counters for deliveries, bounces, and rejects, which is real mail-flow analytics, not just a depth gauge. The catch is operational. It is a component stack, not a product: you assemble the exporter, the TSDB, the dashboards, and the alerting yourself. And the exporter itself is thinly maintained, with no release since 2021, so budget for the possibility of building and patching it in-house.

Read full Netdata vs Prometheus -> postfix_exporter repo ->

Vendor 04 / 10 · #checkmk

Checkmk

Agent-based infrastructure monitoring platform with a built-in Postfix mail queue and instance status check.

Best for

Teams that want agent-based monitoring with automatic service discovery across Linux servers
Organizations that prefer a commercial open-core product with support over a pure DIY stack

Pricing

Open-core: Checkmk Community (Raw) is open source (GPLv2), self-hosted
Paid editions are priced per monitored service, with custom metrics and synthetic tests as additional units
Bill grows with the number of services monitored, not per host

Pros

Built-in postfix_mailq check monitors the length of Postfix mail queues and the status of Postfix mail instances via the Linux agent
Agent auto-discovers services, so Postfix queue checks appear without hand-writing templates
Service-based pricing with no per-host fees; Community edition is open source for smaller deployments within a service-count cap
Mature alerting, dashboards, and reporting in the commercial editions

Cons

Postfix coverage is queue length and instance status only; no maillog delivery or bounce analytics built in
Default check intervals are typically 1 minute; per-second granularity requires custom configuration
Community edition lacks distributed monitoring and enterprise features, pushing larger deployments to paid tiers

Verdict

Checkmk earns this spot on the strength of a genuine built-in Postfix check: the agent finds the queue and the Postfix instances on its own, with no community template roulette. As a general platform it is mature and well-organized, and the open-source Community edition covers small deployments. The Postfix-specific depth is shallow, though. You get queue length and process status, nothing about delivery outcomes, and the default 1-minute check interval is coarse for queue spikes. A solid pick if you want one agent-based platform and Postfix is one checkbox among many; thin if mail flow is the thing you are diagnosing daily.

Read full Netdata vs Checkmk -> Checkmk pricing ->

Vendor 05 / 10 · #solarwinds-sam

SolarWinds Server & Application Monitor

Commercial application monitoring platform with a Postfix template that parses maillog statistics and checks queue and process health.

Best for

Windows-centric IT teams already running SolarWinds Orion or SAM for server and application monitoring
Organizations that want maillog-derived delivery statistics without writing scripts

Pricing

Commercial, licensed per monitored node, billed annually
Bill grows with node count and the SolarWinds platform edition
Self-hosted, on-premises deployment

Pros

Postfix template parses maillog for delivered, forwarded, rejected, received, discarded, deferred, bounced, and held message counts
Also monitors fatal, warning, panic, and error service messages from maillog, plus mail queue length
SNMP-based process monitors for the master, qmgr, and pickup daemons, covering CPU and memory
Optional IMAP4, POP3, and SMTP user-experience monitors test mail round trips

Cons

Requires SSH, root credentials, Perl, and SNMP on the target server: heavyweight setup for a mail host
Per-node licensing and the Orion platform footprint are overkill for monitoring a single Postfix server
Polling cadence is the typical SAM interval of minutes, not per-second
Windows-centric management UI that Linux mail admins may find foreign

Verdict

SAM has the deepest maillog analytics of any tool on this list, and it is not close. The Postfix template actually counts delivered, bounced, rejected, and deferred messages from the log, watches the three key daemons, and can even run round-trip user-experience checks over IMAP, POP3, and SMTP. If you already run SolarWinds, this is excellent Postfix coverage. The problem is everything around it: SSH with root credentials, Perl, SNMP on the target, the Orion platform footprint, and per-node licensing make it a heavy answer to a one-mail-server question. For existing SolarWinds shops it ranks higher than fifth; for everyone else the deployment weight is the deal-breaker.

Read full Netdata vs SolarWinds -> SolarWinds pricing ->

Vendor 06 / 10 · #datadog

Datadog

Commercial SaaS observability platform with an Agent-based Postfix check for queue sizes and mail log collection.

Best for

Organizations already standardized on Datadog that want Postfix queue metrics alongside full-stack observability
Teams that need hosted log management for mail logs without running their own log stack

Pricing

SaaS, usage-based: per-host infrastructure monitoring plus per-GB log ingestion and per-million indexed log events
Bill grows with host count, custom metrics, log volume, and optional APM and security modules
Free tier limited to a small number of hosts with 1-day metric retention

Pros

Official Postfix integration monitors queue sizes for incoming, active, deferred, and hold queues via postqueue -p or find
Log collection for /var/log/mail.log with the postfix source tag, enabling search and correlation with queue metrics
Integration is included in the Agent package; no separate plugin install
Mature alerting, dashboards, and APM integration across the whole stack

Cons

Queue check runs on the Agent’s default interval, typically 15 to 30 seconds at best; no per-second Postfix metrics
The postqueue mode does not report the incoming queue; the find mode requires sudo configuration for dd-agent
Per-host plus per-GB log pricing makes a small mail fleet relatively expensive versus self-hosted options
No Postfix-specific dashboard or mail-flow analytics beyond raw queue gauges and logs

Verdict

Datadog’s Postfix check is real and useful: per-queue gauges across incoming, active, deferred, and hold, plus mail.log ingestion that lets you correlate a queue spike with delivery errors in the same UI. If your organization already pays for Datadog, enable it and move on. The caveats matter for anyone choosing a tool fresh. The postqueue mode silently skips the incoming queue, the find mode needs sudo, the check interval tops out well above per-second, and there is no mail-flow analytics layer beyond the raw gauges. Per-host pricing stacked on per-GB log ingestion also makes this one of the more expensive ways to watch a small mail fleet.

Read full Netdata vs Datadog -> Datadog pricing ->

Vendor 07 / 10 · #nagios

Nagios

Long-standing open-source monitoring platform with plugin-based Postfix queue and service checks.

Best for

Organizations with existing Nagios expertise and plugin ecosystems
Teams that want a battle-tested check and alert framework and are comfortable with config-file management

Pricing

Nagios Core is open source (GPLv2), self-hosted: you run and operate it
Nagios XI is commercial, licensed per monitored node, with Standard and Enterprise editions
Bill grows with node count and the XI edition level

Pros

Official Postfix monitoring solution page documents queue monitoring, service availability, and email send-functionality checks
Large plugin ecosystem including check_postqueue, check_postfix_queue, and community plugins for mailq depth
Nagios Core is GPLv2 open source with no licensing cost; XI adds a GUI, reporting, and support
Proven at scale over two decades of production use

Cons

Postfix monitoring requires assembling plugins and writing check commands; no vendor-maintained Postfix template in XI
Default check intervals are typically 1 to 5 minutes, so queue spikes between checks are missed
XI’s per-node licensing and configuration overhead are heavy for monitoring a single mail server
Core has no built-in log analytics for maillog correlation

Verdict

Nagios covers the Postfix basics the way it covers everything: plugins. Queue depth, service status, and SMTP send-functionality checks all exist, the ecosystem is enormous, and Core is open source with no license fee. What you are buying with your time is assembly: picking a queue plugin, writing the check commands, tuning intervals, and accepting that maillog correlation means a separate log stack or an SSH session. The default 1-to-5-minute check cadence will miss fast queue events, and XI’s per-node licensing is a hard sell for a single mail host. Fine where Nagios is already the house standard; a dated starting point otherwise.

Read full Netdata vs Nagios -> Nagios pricing ->

Vendor 08 / 10 · #site24x7

Site24x7

SaaS monitoring platform with a Python plugin that reports Postfix mailq and per-queue counts.

Best for

SMBs and MSPs that want a hosted monitoring dashboard without running their own monitoring server
Teams that want Postfix queue counts alongside website, server, and network monitoring in one SaaS UI

Pricing

SaaS subscription plans priced per monitor or server count, with tiered feature levels
Bill grows with the number of servers and monitors and the plan tier
Free tier and 30-day trial available

Pros

Official Postfix plugin reports mailq_count plus deferred, active, hold, incoming, bounce, and corrupt queue counts
Plugin uses mailq and qshape commands and runs via the Site24x7 Linux agent with Python 3
Threshold-based alerts on queue spikes with the platform’s notification channels
SaaS model: no monitoring server to operate

Cons

Plugin executes on the agent’s plugin cycle of about 5 minutes, so queue spikes are not caught in real time
Postfix coverage is queue counts only: no maillog delivery analytics or per-message tracing
Per-server and per-monitor pricing accumulates across a fleet, and the plugin is a community-style integration rather than a deep product feature

Verdict

Site24x7’s Postfix plugin is better than expected on paper: it breaks the queue down into deferred, active, hold, incoming, bounce, and corrupt counts, which is more queue detail than Datadog’s check reports. The catch is the cadence. The plugin runs on an agent cycle of roughly five minutes, so a queue that fills and drains between polls never happened as far as your dashboard is concerned. Combined with no maillog analytics, that makes it a queue-count dashboard with alerting, not a diagnostic tool. Reasonable for an MSP or SMB that wants hosted monitoring across mixed infrastructure; limiting when delivery problems are the thing you are chasing.

Read full Netdata vs Site24x7 -> Site24x7 pricing ->

Vendor 09 / 10 · #new-relic

New Relic

Commercial observability platform with a Postfix quickstart that adds dashboards and alerts via the infrastructure agent and Flex configuration.

Best for

Organizations already on New Relic that want Postfix visibility in their existing observability platform
Teams that want prebuilt Postfix dashboards and alerts without writing integrations from scratch

Pricing

SaaS, usage-based: free tier with a monthly ingest allowance, then paid plans by data volume and platform users
Bill grows with ingested data volume and full-platform user seats

Pros

Official Postfix quickstart includes a dashboard for message flows, queue sizes, per-day traffic summaries, and server load
Ships with three alerts: Postfix service down, SMTP authentication failures, and bounced email thresholds
Uses the infrastructure agent with Flex configuration; no separate Postfix agent to install
The free ingest tier makes small deployments inexpensive to start

Cons

Postfix data collection depends on Flex config parsing, which you must tailor to your log format and environment
Queue metrics are not collected at per-second resolution; the quickstart is log-derived and dashboard-oriented
Usage-based pricing on ingested data can grow unpredictably with mail log volume
No mail-queue-specific agent check comparable to Datadog’s or Netdata’s collector

Verdict

New Relic’s Postfix quickstart is a dashboard-and-alert package on top of Flex log parsing rather than a dedicated integration. What you get is genuinely useful for New Relic shops: message-flow and queue dashboards plus three prebuilt alerts, including one on bounced mail, which most tools here ignore. What you do not get is a purpose-built queue collector, and the Flex configuration has to be tailored to your log format before any of it works. Metric resolution is coarse, and because pricing scales with ingested volume, a verbose mail server can grow the bill in ways a flat per-node tool never will. Sensible inside an existing New Relic estate; thin as a dedicated mail monitoring choice.

Read full Netdata vs New Relic -> New Relic pricing ->

Vendor 10 / 10 · #monit

Monit

Lightweight open-source process and service supervisor that can watch Postfix daemons and mail queue size from a small config file.

Best for

Single-server mail admins who want a tiny, dependency-free watchdog for Postfix processes and queue growth
Teams that want automatic restart of failed Postfix services, not just alerts

Pricing

Open source (AGPLv3), self-hosted: you run and operate it
Optional M/Monit commercial management UI is licensed per monitored host

Pros

Actively maintained: Monit 5.35.x is current, and M/Monit 4.3.4 shipped in January 2025
Checks process existence, CPU, and memory, and runs custom scripts such as a mailq count with alerting and automatic restart
Extremely lightweight: a small daemon with a simple config file, no database or web stack
AGPLv3 open source; M/Monit adds a web UI for fleets

Cons

No built-in Postfix integration or maillog parsing; queue checks require a custom script such as community mailq-check.sh examples
No historical metrics or dashboards: Monit is a supervisor, not a time-series monitoring platform
Default check cycle is 30 seconds to minutes, with no per-second granularity
Alerting is email and webhook based; modern incident-tool integration requires scripting

Verdict

Monit is not really a monitoring tool, and ranking it last is not a criticism. It is a supervisor: it watches the Postfix daemons, restarts them when they die, and can run a mailq script and alert when the queue crosses a line. On a single mail server that is exactly the safety net some admins want, and it weighs almost nothing. What it cannot do is tell you anything over time: no history, no dashboards, no delivery analytics, no way to see that the deferred queue has been creeping up for a week. Many teams run Monit for auto-restart alongside a real metrics tool for visibility, which is probably its best role.

Read full Netdata vs Monit -> Monit site ->

Frequently asked questions

How do I monitor the Postfix mail queue?

The queue is read with mailq or postqueue -p, which reports message count and size for the active, deferred, and hold queues. Dedicated tools like Netdata, Datadog, and Site24x7 run this command on an interval and chart the result, while Zabbix and Nagios do it through community plugins. Whatever tool you use, alert on sustained queue growth rather than an absolute count, because normal queue depth varies with mail volume.

What is a normal Postfix queue length?

There is no universal number. Normal queue depth depends on your mail volume and delivery patterns, so a count that is alarming on one server is routine on another. The red flag is sustained growth in the deferred queue, not a momentary spike after a bulk send. Tools that track queue size over time, such as Netdata, Zabbix, or Prometheus, let you establish a baseline per server and alert against that instead of a guessed threshold.

Why is my Postfix queue growing and how do I find out?

Common causes are a recipient server being down, DNS failures, TLS negotiation problems, and remote rate limiting. Check maillog for status=deferred entries and read the reason codes attached to each message; they usually name the cause directly. Tools that correlate queue metrics with mail logs, such as Netdata’s auto-discovered journald logs or Datadog’s log collection, shorten this diagnosis because you see the spike and the log entries in the same place.

Can I monitor Postfix with Prometheus?

Yes. The kumina/postfix_exporter reads the Postfix showq UNIX socket and exposes histograms of message size and age in the queue, and it also parses Postfix logs (systemd journal, Docker logs, or a log file) for delivery and bounce counters. Community Grafana dashboard 10013 renders the metrics across multiple servers. Be aware the exporter’s last release was in 2021, so you may need to build or patch it yourself.

Is there a free Postfix monitoring tool?

How often should I check the Postfix queue?

What metrics matter most for Postfix monitoring?

Start with queue message count and size, ideally broken down by active, deferred, hold, and incoming queues. Add delivery outcomes from maillog: delivered, bounced, rejected, and deferred counts, which tell you why the queue moved, not just that it did. Round it out with service health for the master, qmgr, and pickup daemons, plus host CPU, disk, and network, since a full disk or dead DNS resolver shows up as a mail problem first.

Does Datadog monitor Postfix?

Yes. The Datadog Agent includes a Postfix check that reports queue sizes for the incoming, active, deferred, and hold queues. Two caveats from the integration docs: the postqueue mode skips the incoming queue, and the find mode requires sudo configuration for the dd-agent user. Datadog can also collect /var/log/mail.log for search and correlation, billed at per-GB log pricing on top of per-host monitoring.

How do I alert on Postfix queue growth?

Threshold alerts on queue count or size catch the symptom; set them on the deferred queue specifically, since that is where stuck mail accumulates. Machine-learning anomaly detection, as in Netdata, learns normal queue behavior per server and reduces false positives during legitimate traffic bursts. Pair queue alerts with log-based alerts on bounce and reject rates so you catch the cause, not just the symptom.

The 10 best Postfix monitoring tools, ranked by how fast they catch a stuck queue

How we evaluated Postfix monitoring tools

Netdata

Zabbix

Prometheus + postfix_exporter

Checkmk

SolarWinds Server & Application Monitor

Datadog

Nagios

Site24x7

New Relic

Monit

Frequently asked questions

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