Less boo. More booked. Halloween offer: 30 days free on any paid plan. Claim 30 days freeEvery new account gets one free mailbox for warmup and replies. No domain to buy. See how it works

Skip to content
Warmerly GlockApps
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.

Start freeBack to all features

GlockApps details read from its pricing, home, product, Trust Center, API and MCP pages and help centre on 21 October 2026.

Warmerly

Checked every six hours per mailbox, with a written fix; domain and IP blocklists.

GlockApps

SPF, DKIM and DMARC monitoring every two hours on every account, and free checkers for SPF, DKIM, DMARC, MX, TXT and BIMI.

The short answer

SPF, DKIM and DMARC checks, in one look.

Warmerly checks records every six hours per mailbox and gives a written fix for each finding. GlockApps says every DMARC Analyzer account includes SPF, DKIM and DMARC monitoring every two hours, plus free record checkers. GlockApps checks more often. Last checked 22 October 2026.

Warmerly

Checked every six hours per mailbox, with a written fix; domain and IP blocklists.

GlockAppsGlockApps ahead on this row

SPF, DKIM and DMARC monitoring every two hours on every account, and free checkers for SPF, DKIM, DMARC, MX, TXT and BIMI.

The picture

Drawn side by side.

What gets checked

SPF, DKIM, DMARC and blocklists

WarmerlyGlockApps
WarmerlyEvery 6 hours, on its own
  • SPF10-lookup limit, with a written fix
  • DKIMKey length and test mode
  • DMARCPolicy and reporting address
  • BlocklistsDomain and IP zones
GlockAppsEvery 2 hours, on every account
  • SPFMonitored
  • DKIMMonitored
  • DMARCMonitored
  • Blocklists50+ checked by its free checker

We did not read whether GlockApps gives a written fix for each finding.

How often, over a day

Hours from midnight

WarmerlyGlockApps
WarmerlyA records sweep every 6 hours
0624 h
GlockAppsA check every 2 hours
0624 h

Both are the intervals each states. GlockApps' Uptime Monitor can check down to every minute.

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.

Every six hours, per mailbox, with a written fix.

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

SPF is counted through its includes

The 10 lookup budget is counted recursively through include and redirect, and an IPv6 address after ip4 is flagged as an invalid term.

Warmerly product, checked 21 October 2026

06

DKIM keys are read for length and test mode

The key length is read from the p tag, and the t=y test flag is reported. A lookup that errors gets one retry before it is called an error.

Warmerly product, checked 21 October 2026

07

Sixteen blocklist zones

Six domain zones (Spamhaus DBL, SURBL, URIBL, NordSpam DBL, Spam Eating Monkey URI and s5h) and ten IP zones (Spamhaus ZEN, SpamCop, Barracuda, PSBL, Mailspike, NordSpam, Spam Eating Monkey, Lashback UBL, DroneBL and GBUdb Truncate).

Warmerly product, checked 21 October 2026

08

Three zones are left out on purpose

SORBS, which shut down in 2024, UCEPROTECT, which charges to delist, and Invaluement, which needs a subscription, are not queried.

Warmerly product, checked 21 October 2026

09

The record to publish

Under a failing SPF or DMARC chip the card shows the exact record to add. SPF is suggested only for Google and Microsoft mailboxes and merged into the record already published.

Warmerly product, checked 21 October 2026

10

A refusal is not a listing

A blocklist answer meaning your query was refused is never shown as a listing, so a rate limit cannot make every customer look blocklisted.

Warmerly product, checked 21 October 2026

How GlockApps does it

GlockApps, in detail.

Monitoring every two hours and a set of free checkers.

01

Every two hours

Its DMARC pages say all accounts include free SPF, DKIM and DMARC monitoring every two hours.

glockapps.com/dmarc-analyzer · read 21 October 2026

02

Free record checkers

Its free tools list a spam checker, domain checker, email security checker and SPF, DMARC, DKIM, MX, TXT and BIMI record checkers.

glockapps.com · read 21 October 2026

03

Uptime monitor covers records too

Its Uptime Monitor lists IP addresses, SPF, DKIM and DMARC records among what it watches, with checks down to every minute.

glockapps.com/uptime-blacklist-monitor · read 21 October 2026

04

Blocklist checks

Its free checker covers 50+ blocklists, and Inbox Insight reports against 50+ industry blocklists.

glockapps.com · read 21 October 2026

05

Setting up the DMARC record

Its steps say to publish a TXT record at _dmarc with TTL 3600 or default, and that propagation may take up to 24 hours.

glockapps.com/dmarc-analyzer · read 22 October 2026

06

A guide to the SPF lookup limit

A help article quotes the 10 term limit in RFC 7208 and says a permerror counts as a DMARC fail. It suggests removing unnecessary includes, replacing includes with ip4 or ip6, removing ptr, and flattening only as a last resort. Its worked example falls from 12 lookups to 8.

help.glockapps.com/art/fix-too-many-dns-lookups · read 22 October 2026

07

Gappie checks from chat

The Gappie bot has a /domain command for DMARC, SPF and MX records and an /ip command that checks IPs against more than 30 blocklists, naming Spamhaus, SURBL, SORBS and Invaluement.

glockapps.com/mygappie · read 22 October 2026

08

MTA-STS is not mentioned

The DMARC page does not mention MTA-STS, and its free record checkers cover SPF, DKIM, DMARC, BIMI, MX and TXT.

glockapps.com/dmarc-analyzer · read 22 October 2026

What GlockApps does not say

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

  • Whether the two-hour check gives a written fix for each finding
  • The number of blocklists the uptime monitor checks
  • Whether a failing record comes with the exact record to publish
  • Which DKIM selectors the monitor checks
  • How many records a monitor checks in each run

Where the sources disagree

We report each version rather than pick one.

  • Its home page and Inbox Insight list 50+ blocklists, while its Gappie page says an IP is checked against more than 30. They may describe different tools.
The numbers

Only what we could verify.

SPF, DKIM and DMARC checks: Warmerly and GlockApps side by side. Warmerly is in the first column.
MeasureWarmerlyGlockApps
SPF, DKIM and DMARC checksChecked every six hours per mailbox, with a written fix; domain and IP blocklists.SPF, DKIM and DMARC monitoring every two hours on every account, and free checkers for SPF, DKIM, DMARC, MX, TXT and BIMI.
Record check intervalEvery 6 hoursEvery 2 hours
Blocklists checkedPublished zones, such as Spamhaus50+
Free record checkersSPF, DKIM, DMARC, MX, BIMI and blocklistSPF, DKIM, DMARC, MX, TXT, BIMI
Blocklist zones queried16 zones, 6 for domains and 10 for IPs50+ on its home page, 30+ for Gappie
Checks a day412
MTA-STS checkNot checkedNot mentioned
In practice

What it means for you.

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

1

Both catch a broken record the same day

Two hours or six, a record change is found within the day on either.

2

Warmerly explains the fix

Each Warmerly finding states the record to add. We did not read whether GlockApps does.

3

Sixteen zones against more than fifty

GlockApps names a larger blocklist set. Warmerly's 16 zones are the ones it can query by plain DNS without a key, and it leaves out three on purpose. A listing on a zone neither tool checks would go unseen by both.

4

Four checks a day against twelve

Every six hours is 24 divided by 6, or 4 checks a day. Every two hours is 12. For a record that rarely changes the gap matters little, but after you edit DNS you wait up to 6 hours to see Warmerly's result unless you press Re-check now.

5

Fixing an SPF permerror

A record at 12 lookups against a limit of 10 is the case GlockApps' own article uses. Warmerly flags the same 10 lookup budget and counts through includes, so the finding names the problem before DMARC treats it as a fail.

Who it suits

Pick the one that fits.

Warmerly

Warmerly is the better fit if

  • You want the fix written beside each finding
  • You want record checks per mailbox inside the warmup tool
  • Six-hourly checks are enough
  • You want each finding to come with the record to add
  • You want the check on the mailbox's own Health tab
  • You want a refused query never shown as a listing
GlockApps

GlockApps is the better fit if

  • You want checks every two hours
  • You want free MX, TXT and BIMI checkers
  • You want 50+ blocklists checked
  • You want records checked every two hours
  • You want a command-line style check from Telegram or Slack
  • You want free checkers for TXT and BIMI records
Questions
How often does GlockApps check SPF, DKIM and DMARC?

Its DMARC pages say every two hours on all accounts (glockapps.com, read 21 October 2026).

Does Warmerly check MTA-STS or TLS?

No. It checks SPF, DKIM, DMARC and MX, plus domain and IP blocklists.

How many blocklists does GlockApps check?

Its pages say 50+ in most places and more than 30 for the Gappie bot (read 22 October 2026). We could not reconcile the two.

Sources

GlockApps 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
PreviousDMARC reportingNextUptime and IP reputation monitors

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.

Start freeFull GlockApps comparison

Free plan, no card. Paid plans: 7-day trial, first charge on day 8.