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 Warmbox
One-to-one · Spam rescue

Spam rescue

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

Start freeBack to all features

Warmbox details read from its pricing, home, features, agency and checker pages and its help centre on 21 October 2026.

Warmerly

Every spam-placed warmup mail is moved to the inbox after 10 to 120 minutes, marked read, starred and important.

Warmbox

Auto-Remove from Spam on every plan; timing not stated.

The short answer

Spam rescue, in one look.

Warmerly and Warmbox both rescue warm-up mail from spam. Warmerly moves every spam-placed warmup message to the inbox after a delay of 10 to 120 minutes, marks it read, starred and important, and queues a reply. Warmbox lists Auto-Remove from Spam on every plan and says it moves, opens and bookmarks warm-up emails, but gives no timing. Last checked 22 October 2026.

Warmerly

Every spam-placed warmup mail is moved to the inbox after 10 to 120 minutes, marked read, starred and important.

Warmbox

Auto-Remove from Spam on every plan; timing not stated.

The picture

Drawn side by side.

From spam to inbox

Minutes between a warmup email landing in spam and it being moved out

WarmerlyWarmbox
Warmerly10 to 120 minutes (10 to 20 for a mailbox's first email)
SpamInbox
0120 min
WarmboxAuto-Remove from Spam is listed; no timing is stated
SpamInbox

Warmerly's timings come from its warmup code. We found no rescue timing on Warmbox's pages.

What each does with a rescued mail

The steps each page describes

WarmerlyWarmbox
Warmerly
Found in spamRead after a delayStarred and importantMoved to the inboxReply queued
Warmbox
Sent from your inboxRemoved from spamOpenedBookmarkedSome replied to

Warmbox's list comes from its features page. It does not say whether a message is marked important or when it is moved.

How Warmerly does it

Warmerly, in detail.

Every spam-placed warmup message, after a human-like delay.

01

Every spam-placed warmup mail

The processor recovers any warmup message found in a recipient's spam or junk folder. It never touches campaign mail to real prospects.

Warmerly product, checked 21 October 2026

02

What a rescue does

It marks the message read, starred and important and moves it to the inbox. On Gmail, moving out of Spam is the Not spam signal.

Warmerly product, checked 21 October 2026

03

When it happens

Each message has a read delay of 10 to 120 minutes, and the first email of a mailbox is read after 10 to 20 minutes.

Warmerly product, checked 21 October 2026

04

A reply follows

After a rescue a reply is queued unless the thread is at depth 3.

Warmerly product, checked 21 October 2026

05

Every spam-placed warmup mail

The processor recovers any warmup message found in a recipient's spam or junk folder. It never touches campaign mail to real prospects.

Warmerly product, checked 21 October 2026

06

What a rescue does

It marks the message read, starred and important and moves it to the inbox. On Gmail, moving out of Spam is the Not spam signal.

Warmerly product, checked 21 October 2026

07

When it happens

Each message has a read delay of 10 to 120 minutes, and the first email of a mailbox is read after 10 to 20 minutes.

Warmerly product, checked 21 October 2026

08

Not sampled

Every message found in spam is rescued. There is no percentage and no random skip, because a message left in Spam keeps teaching the filter that the sender is junk.

Warmerly product, checked 21 October 2026

09

Four folders are searched

The recipient side looks in [Gmail]/Spam, Junk, Spam and Junk Email, which covers Gmail, Outlook and the common IMAP names.

Warmerly product, checked 21 October 2026

10

It clears the junk flag first

Before moving the message, the processor removes the Junk keywords and adds NotJunk keywords. This is best effort, because servers differ on which keywords they accept.

Warmerly product, checked 21 October 2026

11

A reply follows a rescue

After a rescue the recipient queues a reply whatever its usual reply rate. The reply is skipped at thread depth 3, or when the recipient is not active or ageing with warmup on.

Warmerly product, checked 21 October 2026

12

Rescues are counted

A rescued job is recorded as delivered to spam and as opened, so rescues show up in placement and rescue figures instead of vanishing.

Warmerly product, checked 21 October 2026

13

Spam placement slows the ramp

A spam placement score of 10 or more cuts a mailbox's daily quota to 70%, and 20 or more to 40%, until placement recovers.

Warmerly product, checked 21 October 2026

14

Lost mail has an end state

A warmup message still unfound after 72 hours is closed as unknown, so it cannot sit in the figures as pending forever.

Warmerly product, checked 21 October 2026

How Warmbox does it

Warmbox, in detail.

Spam removal, opens, bookmarks and replies, on every plan.

01

Auto-Remove from Spam

Listed among the features included in all plans. The features page says Warmbox sends emails from your inbox, then removes them from the spam folder.

warmbox.ai/pricing · read 21 October 2026

04

Counted in analytics

The Analytics article counts "interactions", including removal from spam and starring, and shows a spam rate: the share of warm-up emails that land in spam.

help.warmbox.ai/en/articles/4803475-analytics · read 21 October 2026

05

The cycle in its words

Its help article says that if an email hits a spam folder, Warmbox automatically moves it to the Primary Inbox, then opens your emails, marks them as Important and sends replies.

help.warmbox.ai/en/articles/4803427-what-is-warmbox · read 22 October 2026

09

A spam rate to follow

The Spam Rate is the proportion of your warm-up emails that end up in spam, and Warmbox calls it an indicator of improving deliverability.

help.warmbox.ai/en/articles/4803475-analytics · read 22 October 2026

11

On every plan

Auto-Remove from Spam and Mark as favorite emails are in the list of features included in all plans.

warmbox.ai/pricing · read 22 October 2026

What Warmbox does not say

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

  • How long after landing in spam a message is moved
  • Whether a rescued message is marked important
  • Whether the rescue is per message or a share of messages
  • The delay before a message is moved
  • Which provider folders are checked
  • Whether a rescue is applied to every message
  • What happens to a message that is rescued twice

Where the sources disagree

We report each version rather than pick one.

  • Warmbox's help article claims a 25% to 35% rise in open rates within 3 weeks, while its pricing page says first results usually take 15 to 30 days and its how-long article says 30 to 50 days. We do not show any of these as a result.
The numbers

Only what we could verify.

Spam rescue: Warmerly and Warmbox side by side. Warmerly is in the first column.
MeasureWarmerlyWarmbox
Spam rescueEvery spam-placed warmup mail is moved to the inbox after 10 to 120 minutes, marked read, starred and important.Auto-Remove from Spam on every plan; timing not stated.
Delay before a rescue10 to 120 minutesNot stated
First email of a mailboxRead after 10 to 20 minutesNot stated
Reply after a rescueQueued, up to thread depth 3Part of emails, by reply rate
Share of spam-placed warmup mail rescuedEvery message found in spamNot stated
Flags set on a rescued messageRead, starred and importantOpened and bookmarked or favourite
Folders searched4 named foldersNot stated
Lost mail closed as unknownAfter 72 hoursNot stated
Spam placement effect on quotaUnder 10: none, 10 or more: 70%, 20 or more: 40%Not stated
Spam rate shownPlacement and rescue figuresSpam Rate in analytics
Claimed open rate gainNone claimed25% to 35% within 3 weeks
Included on every planYesYes
In practice

What it means for you.

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

1

Both do the same job

Warm-up mail that lands in spam is moved out so providers see a positive signal. The difference is how much each tells you.

2

Warmerly shows its working

Timing, the star and important flags and the reply rule are documented. Warmbox's pages stay general.

3

The job is the same

Both tools move warm-up mail out of spam and give it a positive signal. The difference is how much you can check. Warmerly documents the timing, the flags, the folders and the reply rule. Warmbox describes the outcome.

4

Do not read it as a guarantee

A rescue improves how providers see your warm-up mail between warm-up inboxes. It does not move your prospects' mail out of spam, and neither tool claims that it does.

5

Be careful with the 25 to 35 percent claim

Warmbox says users typically see this rise in open rates. It gives no sample, period or method, and open rates are unreliable because of privacy features in mail apps. We show the claim and do not repeat it as a result.

6

Where Warmbox is ahead

It shows a spam rate for each inbox in its analytics tab, and its pages describe the cycle in plain steps. Warmerly shows placement and rescue figures, but the page does not call it a spam rate.

7

Check the spam rate for yourself

Whichever tool you use, watch whether spam placement of warm-up mail falls over the first few weeks. If it does not, look at your DNS records and your domain before you blame the tool.

Who it suits

Pick the one that fits.

Warmerly

Warmerly is the better fit if

  • You want the timing and the flags written down
  • You want every spam-placed warmup message rescued, not a share
  • You want the delay and the flags written down
  • You want rescues counted in your figures
  • You want spam placement to slow the ramp automatically
  • You want the rule for the reply after a rescue stated
Warmbox

Warmbox is the better fit if

  • You want a spam rate shown per inbox in analytics
  • You want Mark as favourite listed as its own feature
  • You want a spam rate figure for each inbox in analytics
  • You like its plain description of the cycle
  • You want Mark as favourite emails and Auto-Remove listed as plan features
  • You want the reply rate set by you, up to 45%
  • You want its stated network to carry out the rescue
Questions
How fast does Warmerly rescue mail from spam?

After a delay of 10 to 120 minutes. Warmbox gives no timing.

What happens to a rescued message?

Warmerly marks it read, starred and important, and queues a reply up to thread depth 3. Warmbox opens and bookmarks it.

What if a message is never found?

Warmerly closes lost mail as unknown after 72 hours.

Does either promise a better open rate?

Warmbox claims a 25% to 35% gain within 3 weeks. Warmerly claims none.

Sources

Warmbox 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
PreviousWarm-up volume guidanceNextWarming after the ramp

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 Warmbox comparison

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