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Warmerly
One-to-one · Reply with quoted history

Reply with quoted history

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

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Instantly details read from its pricing and help pages on 15 and 17 October 2026.

Warmerly

Yes

Not published

The short answer

Replies with quoted history, in one look.

Warmerly's warmup replies do include the original message quoted underneath, with Re: subjects and In-Reply-To and References headers. Instantly publishes that a share of warmup emails get replies (Reply rate setting, 30 per cent suggested) but we found nothing in its docs that says whether those replies quote the original, so it is not published rather than a yes or no. Last checked 19 October 2026.

Warmerly

Yes

Not published

The picture

Drawn side by side.

What a Warmerly warmup reply looks like

Example only, not a real message

Warmerly
ExampleRe: Q3 planning notes

In-Reply-To set · References set · Subject starts with Re:

Sounds good, Thursday works for me.

On Monday, Priya wrote:Quick one before Thursday: are we still on for the Q3 planning notes?
InstantlyNot published

Instantly says a share of warmup emails get replies (a Reply rate setting, 30 per cent suggested). We found nothing in its docs on whether a reply quotes the original.

The example text is made up for illustration. The headers and quoting are how Warmerly's warmup builds a reply.

On screen

What it looks like.

WarmerlySample data
Inbox. Everyone who replied, with the thread and a suggested reply, sample dataInbox. Everyone who replied, with the thread and a suggested reply, sample data
Inbox. Everyone who replied, with the thread and a suggested reply.Warmerly app, sample data.
How Warmerly does it

Warmerly, in detail.

Each warmup reply is built from the original message: text quoted line by line, an HTML quote block, a Re: subject and threading headers.

01

How a reply is built

When a recipient's job is processed and a reply is decided, the processor creates a new warmup job from the recipient back to the sender. The plain-text body is a short reply, then "On <date>:", then every line of the original prefixed with "> ". The HTML body puts the original inside a block with a grey left border below the reply.

Warmerly product, checked 19 October 2026

02

Threading

The subject gets "Re: " only if it is not already there, so chains do not stack. The send sets In-Reply-To and References to the original message's id, and the job records parent id and thread depth, so providers see one conversation.

Warmerly product, checked 19 October 2026

03

When a reply happens

The default reply probability is 0.3 for a first message, 0.35 times that for deeper replies, and threads stop at depth 3. It is tuned between 0.15 and 0.40 by the mailbox's health; it is not a setting you change. A spam rescue always queues a reply. The reply is scheduled 20 to 90 minutes after the open, moved into the replying mailbox's send window, and into the next morning if it would fall after hours.

Warmerly product, checked 19 October 2026

04

One honest detail

The attribution line reads "On Mon, Oct 5, 2026:" and does not name the sender or end in "wrote:" as most mail clients do. The quoted content itself is the full original body.

Warmerly product, checked 19 October 2026

How Instantly does it

Instantly, in detail.

Instantly says warmup emails receive replies from the pool at a rate you set, with positive sentiment. It does not describe how replies are formatted.

03

How the traffic is generated

The warmup page says warmup runs through a private network of headless browsers and uses read emulation to scroll through messages. This describes opens, not reply text.

instantly.ai/email-warmup · read 19 October 2026

What Instantly does not say

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

  • Searched help.instantly.ai (Warm-Up collection, Warmup Settings, How Warm-Up Works, Filter Warmup Emails, Deliverability Guide), instantly.ai/email-warmup and developer.instantly.ai for whether warmup replies quote the original message, set In-Reply-To or References, or form a thread; found no statement.
The numbers

Only what we could verify.

Reply with quoted history: Warmerly and Instantly side by side. Warmerly is in the first column.
MeasureWarmerly
Reply with quoted historyYesNot published
Warmup replies existYes, default probability 0.3 on a first messageYes, Reply rate setting, 30 per cent suggested
Quoted original in replyYes (text and HTML)Not published
Threading headersIn-Reply-To and References set, Re: subjectNot published
Maximum thread depth3Not published
Reply rate adjustableNo, tuned by healthYes, per account
Warmup body formatText and HTMLPlain text
In practice

What it means for you.

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

1

Why quoting is worth asking about

Our reading: a reply that quotes the original and carries threading headers looks like a normal mail conversation. We do not have evidence of how much weight any provider gives this, so we describe it as design intent, not a measured effect.

2

Do not assume Instantly lacks it

Our reading: the absence of a statement is not a no. If this matters to you, ask Instantly support, or send a test between two of your own accounts and look at the raw reply.

3

Tune the rate, not just the format

Our reading: both tools let you change how often replies happen, and 30 per cent is the default on both, so the decision is more about format and visibility than volume.

Who it suits

Pick the one that fits.

Warmerly

Warmerly is the better fit if

  • You want warmup replies that quote the original and thread properly, and you want that documented.
  • You want to be able to see in the code or docs how replies are formed.
  • You like the guarantee that a spam rescue is followed by a reply.

Instantly is the better fit if

  • You want warmup mail that is plain text and easy to filter by a workspace tag.
  • You care more about reply rate and open rate controls than the reply format.
  • You are happy to rely on a large pool without knowing the reply format.
Questions
Do Warmerly warmup replies quote the original message?

Yes. The text version prefixes each original line with "> " under an "On <date>:" line, and the HTML version places the original in a bordered quote block.

Do Instantly warmup replies quote the original?

Instantly does not say. Its docs cover the reply rate and say warmup mail is plain text, but not whether replies quote the original.

How often does warmup reply on each tool?

Warmerly's default is 0.3 on a first message, lower deeper in a thread, up to depth 3. Instantly's suggested Reply rate is 30 per cent.

Are the replies threaded?

On Warmerly, yes: Re: subject plus In-Reply-To and References. Instantly does not publish this.

Sources

Instantly pages were read on 19 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.

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