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One-to-one · SPF, DKIM and DMARC checks

SPF, DKIM and DMARC checks

One row, in depth: what each tool does, the verified numbers, and who each suits.

Warmy details read from its pricing page, FAQ, home page, product pages and security page on 21 October 2026.

Warmerly

Checked every six hours per mailbox, with a written fix; free DMARC reports, with no alerts.

Warmy

DMARC monitoring with daily reports and new-sender alerts; record checks shown in its deliverability screen.

The short answer

SPF, DKIM and DMARC monitoring, in one look.

Warmerly checks SPF, DKIM, DMARC and MX every six hours for each connected mailbox, with a written fix for each problem, and offers free DMARC report collection. Warmy has a DMARC monitoring product that reads daily aggregate reports and spots new sending sources within 24 hours, and shows record checks in its deliverability screen. Warmy is ahead on report alerts.

Warmerly

Checked every six hours per mailbox, with a written fix; free DMARC reports, with no alerts.

WarmyWarmy ahead on this row

DMARC monitoring with daily reports and new-sender alerts; record checks shown in its deliverability screen.

The picture

Drawn side by side.

How the records get checked

SPF, DKIM, DMARC and MX

WarmerlyWarmy
WarmerlyEvery 6 hours, on its own
  • SPFChecked, with a written fix
  • DKIMChecked, with a written fix
  • DMARCChecked, with a written fix
  • MXChecked
WarmyReports arrive daily
  • RUA reportsDaily, merged per domain
  • New sourcesDetected within 24 hours
  • SPF and DKIMPass or fail, with alignment
  • Record checksShown in Deliverability Insights, schedule not stated

Warmerly also collects DMARC reports for free, for up to 10 domains, without alerts. Warmy's monitoring adds alerts when a new sender appears.

How often, over a day

Hours from midnight

WarmerlyWarmy
WarmerlyA records sweep every 6 hours
0624 h
WarmyAggregate reports each day; new sources within 24 hours

Warmy does not state how often it checks the records themselves.

On screen

What it looks like.

WarmerlySample data
Domains and DNS. Every domain checked, with the exact record to add when one is missing, sample dataDomains and DNS. Every domain checked, with the exact record to add when one is missing, sample data
Domains and DNS. Every domain checked, with the exact record to add when one is missing.Warmerly app, sample data.
How Warmerly does it

Warmerly, in detail.

Scheduled record checks per mailbox, plus free report collection.

01

Checked every six hours

The records sweep runs every six hours across every mailbox that is not dead or paused. A Re-check now option is on the mailbox Health tab.

Warmerly product, checked 21 October 2026

02

A written fix for each finding

Each finding has a title, an explanation and a fix. SPF is checked for the 10-lookup limit, DKIM for key length and test mode, DMARC for policy and reporting address.

Warmerly product, checked 21 October 2026

03

Unknown is never green

A check that could not run is shown as unknown, not as fine.

Warmerly product, checked 21 October 2026

04

Free DMARC report collection

Point your DMARC reporting address at a Warmerly address to see who sends as your domain and whether they pass, for up to 10 domains per workspace. Email digests and alerts for these reports are not built.

Warmerly product, checked 21 October 2026

05

Blocklists are checked too

Domain zones such as Spamhaus DBL and SURBL and IP zones such as Spamhaus ZEN, SpamCop and Barracuda are queried by plain DNS lookup, about every six hours.

Warmerly product, checked 21 October 2026

06

A refusal is not a listing

A zone that refuses a query is reported as an error, not as a listing, so rate-limiting does not make every customer look blocklisted.

Warmerly product, checked 21 October 2026

07

The exact record to publish

Under a failing SPF or DMARC chip the card shows the record to paste, merged into the one you have now. DMARC is suggested as monitor only.

Warmerly product, checked 21 October 2026

08

Webhooks on a DNS change

A dns_changed webhook event exists on the Agency plan, along with score drops and authentication failures.

Warmerly product, checked 21 October 2026

09

Free checkers, no account

SPF, DKIM, DMARC, MX, BIMI and blacklist checkers, record generators and a warmup calculator are free on the public site.

Warmerly product, checked 21 October 2026

10

DMARC reports kept 90 days

Processed reports are pruned 90 days after their period ends, and the job reads the shared mailbox every 30 minutes.

Warmerly product, checked 21 October 2026

How Warmy does it

Warmy, in detail.

A report-based DMARC product, with the record-check schedule left unsaid.

01

Daily aggregate reports

The DMARC monitoring page says aggregate reports arrive daily, merged into one timeline per domain, with each sending source and SPF and DKIM alignment.

warmy.io/product/dmarc-monitoring · read 21 October 2026

02

New sources within 24 hours

New sending sources are detected within 24 hours, and alerts fire when a new source appears or a known one starts failing.

warmy.io/product/dmarc-monitoring · read 21 October 2026

03

Limits

The page says unlimited DMARC reports processed and that 1 domain is enough to start. It does not say whether a domain limit applies to a plan.

warmy.io/product/dmarc-monitoring · read 21 October 2026

04

Record checks elsewhere

The Deliverability Insights screen shows SPF, DKIM, DMARC and MX records and blacklist status. The page does not say how often they are checked.

warmy.io/product/dmarc-monitoring · read 21 October 2026

05

Setup is one edit

Add Warmy's reporting address to the rua tag. The page says Warmy only receives reports and does not change how your mail is sent.

warmy.io/product/dmarc-monitoring · read 22 October 2026

07

Names for sources

Each sending source is named, unknown IPs are grouped, and the dashboard shows volume, SPF and DKIM results and alignment per source and per day.

warmy.io/product/dmarc-monitoring · read 22 October 2026

08

Enforcement guidance

The page describes a path from p=none to quarantine to reject, and says Warmy shows when a domain is ready for each step. It does not say how readiness is judged.

warmy.io/product/dmarc-monitoring · read 22 October 2026

09

Free DNS tools

Free tools include a DNS record checker, MX lookup, SPF checker and flattener, DKIM generator and checker, DMARC checker and email header analyser.

warmy.io/product/deliverability · read 22 October 2026

What Warmy does not say

We looked, and found no statement on these. That is about its published pages only, not about the product.

  • How often SPF and DKIM records are checked
  • Alert channels and settings
  • How long report history is kept
  • Alert delivery method and frequency
  • How blocklist status is checked and how often
The numbers

Only what we could verify.

SPF, DKIM and DMARC checks: Warmerly and Warmy side by side. Warmerly is in the first column.
MeasureWarmerlyWarmy
SPF, DKIM and DMARC checksChecked every six hours per mailbox, with a written fix; free DMARC reports, with no alerts.DMARC monitoring with daily reports and new-sender alerts; record checks shown in its deliverability screen.
Record check intervalEvery 6 hoursNot stated
DMARC reportsFree, up to 10 domainsDaily reports, unlimited processed
New sender alertNot offered for DMARC reportsWithin 24 hours
Blocklists checkedDomain and IP zones, named in the docsChecker named, zones not listed
Report retention90 daysNot stated
Free domainsUp to 10 per workspaceNot stated
In practice

What it means for you.

Our reading of the facts above. Not a promise, and not the only reasonable reading.

1

Both help you reach enforcement

Report collection shows who sends as your domain, which is what you need before moving DMARC to reject.

2

Check the schedule you need

If you want records checked on a known schedule, Warmerly states six hours. Warmy does not state one.

3

If you only need to know a record is wrong

Warmerly's check, with a written fix, covers it. If you need to know who else sends as your domain, Warmy's alerts are ahead.

4

Move DMARC slowly

Whichever you use, start at p=none and move on only when the reports look clean.

Who it suits

Pick the one that fits.

Warmerly

Warmerly is the better fit if

  • You want records checked on a stated schedule
  • You want a written fix for each failing record
  • You want free report collection with your plan
  • You want records and blocklists checked every six hours with a fix for each finding
  • You want free DMARC reports for up to 10 domains
Warmy

Warmy is the better fit if

  • You want a dedicated DMARC monitoring product
  • You want new sending sources flagged within 24 hours
  • You want report timelines per domain
  • You want alerts when a new sender appears or a known one fails
  • You want enforcement guidance from p=none to reject
Questions
How often does Warmerly check SPF, DKIM and DMARC?

Every 6 hours for each connected mailbox that is not paused, with a written fix for each problem.

Does Warmy monitor DMARC?

Yes. Its DMARC monitoring page describes daily aggregate reports and spots new sending sources within 24 hours.

Is DMARC report monitoring free on Warmerly?

Yes, for up to 10 domains per workspace, with reports kept for 90 days.

Which tool is ahead on DMARC alerts?

Warmy, because it alerts on new senders within 24 hours and Warmerly does not offer that for DMARC reports.

Sources

Warmy pages were read on 21 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.

See it on your own mailbox.

Connect a mailbox. Warmerly runs alongside whatever you send from now, so you can compare before you move anything.

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