Warmerly
Checked every six hours per mailbox, with a written fix; domain and IP blocklists; free DMARC reports, with no alerts.
Warmerly
Mailreach
One-to-one · SPF, DKIM, DMARC and blocklist checks
SPF, DKIM, DMARC and blocklist checks
One row, in depth: what each tool does, the verified numbers, and who each suits.
Mailreach details read from its pricing page and script, home page, product pages, terms, privacy policy and docs on 21 October 2026.
Warmerly
Checked every six hours per mailbox, with a written fix; domain and IP blocklists; free DMARC reports, with no alerts.
Mailreach
Health checks for blacklist, SPF, DKIM, DMARC and ETS listed in its plan; how often they run is not stated.
The short answer
SPF, DKIM, DMARC and blocklist checks, in one look.
Both check SPF, DKIM and DMARC and look for blocklistings. Warmerly publishes how often (every six hours), what it checks inside each record and the exact fix. Mailreach lists the checks in its plans and does not say how often they run. Last checked 22 October 2026.
Mailreach
Health checks for blacklist, SPF, DKIM, DMARC and ETS listed in its plan; how often they run is not stated.
The picture
Drawn side by side.
How the records get checked
SPF, DKIM, DMARC and blocklists
WarmerlyMailreach
WarmerlyEvery 6 hours, on its own
- SPFChecked, with a written fix
- DKIMChecked, with a written fix
- DMARCChecked, with a written fix
- BlocklistsDomain and IP zones
MailreachListed in the plan, schedule not stated
- SPFListed
- DKIMListed
- DMARCListed
- BlacklistListed
- ETSListed, not defined
Mailreach also checks MX records, reverse DNS and domain age inside each spam test.
How often, over a day
Hours from midnight
WarmerlyMailreach
WarmerlyA records sweep every 6 hours
0624 h
MailreachNot stated for the plan's health checks
Mailreach does not say how often its health checks run.
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
Scheduled record and blocklist checks across named zones, with a written fix for each finding and honest handling of checks that could not run.
01
Checked every six hours
The records sweep runs every six hours, so four times in 24 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
Domain and IP blocklists
Domains and sending IPs are looked up against published blocklist zones, such as Spamhaus, and a listing raises an alert.
Warmerly product, checked 21 October 2026
04
Unknown is never green
A check that could not run is shown as unknown, not as fine.
Warmerly product, checked 21 October 2026
05
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
06
Sixteen named zones
Six domain zones (Spamhaus DBL, SURBL, URIBL, NordSpam, Spam Eating Monkey and s5h) and ten IP zones (Spamhaus ZEN, SpamCop, Barracuda, PSBL, Mailspike, NordSpam, Spam Eating Monkey, Lashback, DroneBL and GBUdb) are queried by plain DNS lookup.
Warmerly product, checked 21 October 2026
07
Three lists left out on purpose
SORBS (shut down in 2024), UCEPROTECT (pay to delist) and Invaluement (subscription only) are excluded, with the reasons written in the file.
Warmerly product, checked 21 October 2026
08
A refusal is not a listing
Some lists answer a refused query with a code in the same range as a real listing. Each zone classifies its own codes, and anything unrecognised is shown as an error, so being rate limited never reports a customer as blacklisted.
Warmerly product, checked 21 October 2026
09
Coverage is shown, not only status
A clean result on every list and a clean result on the few that answered are stored differently, and a partial answer shows amber with the count.
Warmerly product, checked 21 October 2026
10
Mail provider hosts are not checked
A mailbox on Gmail or Outlook has no server of its own to look up, so provider hosts and shared consumer domains are marked not applicable instead of being graded against records the customer cannot change.
Warmerly product, checked 21 October 2026
11
The exact record to publish
Under a failing SPF or DMARC check the card shows the record to add, merged into the SPF record already published, and never a second SPF record.
Warmerly product, checked 21 October 2026
How Mailreach does it
Mailreach, in detail.
Health checks listed in the all in one plan and inside each spam test, with free checker pages and no stated schedule or zone list.
01
Listed in the all-in-one plan
The plan lists domain and inbox health checks covering blacklist, SPF, DKIM, DMARC and ETS. ETS is not defined on the page.
mailreach.co/pricing · read 21 October 2026
02
Also inside each spam test
A spam test checks SPF, DKIM, DMARC, MX records, reverse DNS, domain age and whether the domain or mail server IP is blacklisted.
mailreach.co/email-spam-test · read 21 October 2026
03
Checkers with the spam tester
The spam tester plan lists an SPF, DKIM and DMARC checker, an email blacklist checker and a reverse DNS checker.
mailreach.co/pricing · read 21 October 2026
04
Free SPF and DKIM checkers
The site links to a free SPF checker and a free DKIM checker.
mailreach.co · read 21 October 2026
05
Domain age and reverse DNS in the test
Its spam test also reports domain age and reverse DNS, and organises results into Checks and Setup sections.
mailreach.co/email-spam-test · read 22 October 2026
06
Health checks are part of the warmer plan
The warmer plan lists domain and inbox health checks next to fully automated warmup, a reputation dashboard and up to 100 emails a day.
mailreach.co/pricing · read 22 October 2026
07
Setup help for SPF and DKIM
Its help centre's most read articles include How to properly set up SPF and DKIM records and a fix for the 550 5.1.8 bad outbound sender error. We read titles only.
help.mailreach.co/en · read 22 October 2026
08
Free checker pages
The home page links a free SPF checker and a free DKIM checker, and the pricing page lists an email blacklist checker and a reverse DNS checker with the spam tester.
mailreach.co · read 22 October 2026
What Mailreach does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- How often the plan's health checks run
- Which blacklists are checked
- What ETS stands for
- Whether findings come with a written fix
- Whether checks run without a spam test being started
- Whether DMARC reports are collected
- How a failing record is explained to the user
Where the sources disagree
We report each version rather than pick one.
- Its help centre covers setting up SPF and DKIM records but does not say whether the product checks them on a schedule.
The numbers
Only what we could verify.
| Measure | Warmerly | Mailreach |
|---|---|---|
| SPF, DKIM, DMARC and blocklist checks | Checked every six hours per mailbox, with a written fix; domain and IP blocklists; free DMARC reports, with no alerts. | Health checks for blacklist, SPF, DKIM, DMARC and ETS listed in its plan; how often they run is not stated. |
| Record checks | Every 6 hours | Not stated |
| Records checked | SPF, DKIM, DMARC and MX | SPF, DKIM, DMARC, MX and reverse DNS |
| DMARC report collection | Free, up to 10 domains | Not stated |
| Blocklist zones queried | 6 domain and 10 IP | Not stated |
| Written fix per finding | Yes, with the record to add | Not stated |
| SPF lookup budget check | Yes, the 10 lookup limit | Not stated |
| Check older than 48 hours | Shown as unknown | Not stated |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Both cover the basics
If SPF, DKIM, DMARC and blocklists are all you need, the difference is how much each tells you. Warmerly shows the exact record to add.
Ask about the schedule
Mailreach does not publish how often its health checks run.
One domain, many mailboxes
A domain that backs 25 mailboxes costs one domain blocklist query per sweep, not 25, and its owner gets one alert rather than 25. A provider server that backs 50 mailboxes costs one IP query. This is how checks stay frequent without hammering the lists.
Counting SPF lookups
SPF allows 10 DNS lookups. A record with four include statements that each expand to three more lookups spends 12 and breaks, so mail can fail authentication even though every include looks fine. Warmerly counts this recursively and says so; a checker that only tests presence would pass it.
Four looks a day
Records are checked every six hours, so four times in 24 hours. For a mailbox that changes DNS on a Friday afternoon, the first alert can come that evening and not the following Monday. Mailreach does not state its schedule, so ask before you rely on it.
Reading a clean result
If 3 lists answered and 10 refused, the honest result is clean on 3. Warmerly shows that count. Whether Mailreach reports partial coverage is not stated, so treat a bare tick from any tool as a question about coverage.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want the exact record to publish
- You want a known schedule
- You want free DMARC report collection
- You want the number of lists checked and which ones
- You want a check that could not run to show as unknown
- You want an SPF record merged for you, not a lecture about it
Mailreach
Mailreach is the better fit if
- You want checks bundled with a spam test
- You want reverse DNS and domain age in the same report
- You are happy to read a report and fix records yourself
- You want DNS, domain age and blacklist checks inside each spam test
- You want free SPF and DKIM checker pages
- You want reverse DNS covered by name
Questions
Does Mailreach check SPF, DKIM and DMARC?
Yes. Its all-in-one plan lists domain and inbox health checks for blacklist, SPF, DKIM, DMARC and ETS, and its spam test checks the same records (mailreach.co/pricing, read 21 October 2026). It does not say how often the checks run.
How often does Warmerly check my records?
Every six hours per mailbox, with a Re-check now button on the mailbox Health tab.
Which blocklists does Warmerly check?
Six domain lists and ten IP lists, including Spamhaus, SURBL, URIBL, SpamCop, Barracuda and Mailspike, by DNS lookup. SORBS, UCEPROTECT and Invaluement are left out for stated reasons.
Does Mailreach say which blacklists it checks?
No. It says the spam test checks whether the domain or mail server IP is blacklisted, and names no lists (read 22 October 2026).
Does Warmerly alert on every DNS warning?
No. It alerts on hard failures only. Advisories, such as a monitor only DMARC policy, show on the card but never raise an alert.
Sources
Mailreach 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.
More features
See it on your own mailbox.
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