Outreach ops, audited weekly

Your blended reply rate looks fine. One campaign underneath it is killing your domain.

Connect a sending account read-only. Every Saturday at 15:00 UTC Sendline reads sends, replies, bounces and unsubscribes for every active campaign, scores each one against its own four-week baseline, and writes a verdict that names the campaign in trouble. It never sends, never edits, never touches a contact.

Get your free audit See the Saturday readout

First audit runs the same day · read-only, never sends · no card required

Works across

Gmail Any sequencer Campaign stats

Editorial illustration of a deliverability monitoring desk: cyan telemetry lines tracking weekly reply volume across four cold-email campaigns, with one line falling away from the rest. — Aug 23 run · 4 campaigns · 2,310 sends read in 10 minutes · 1 flagged

Reply rate

6.8%

up from 5.9% last week

Bounce rate

1.4%

threshold is 3.0%

At-risk

Webinar Invite, replies −38%

Sends read

2,310

past 7 days · 9 unsubscribes

What you receive

The Saturday readout, exactly as it lands.

Every active campaign, scored against its own prior four weeks. This is the August 23 run.

Reply rate 6.8% · one campaign flagged at-riskAug 23, 2026 · connected sending account, read-only

Campaign	Sends	Reply	WoW	Bounce	Status
Founder Intro	812	7.8%	+1.1pt	0.9%	Healthy
Case Study Drop	640	8.1%	+0.4pt	1.1%	Healthy
Re-engage Q3	421	6.4%	−0.3pt	1.7%	Watch
Webinar Invite	437	3.4%	−38%	2.6%	At-risk

Reply volume · last 5 weeks

Jul 26Aug 2Aug 9Aug 16Aug 23

Written verdict

Reply rate 6.8%, up from 5.9%; bounce 1.4%, under the 3% threshold. One flag: Webinar Invite's replies fell 38% against its four-week baseline.

Run your free audit

How it works

Three steps, then it never needs you again.

01Connect read-only

Sign in and connect the sending account. Sendline asks for read access to campaign stats and nothing else — it cannot send, pause, or edit a thing.

02Saturday, 15:00 UTC

Sends, replies, bounces and unsubscribes are pulled per campaign, then scored against that campaign's own prior four weeks. Last run: 2,310 sends in ten minutes.

03The verdict lands

KPI tiles, five weeks of reply trend, and a plain-English flag on any campaign past 3% bounce or down a third on replies.

Inside every delivery

Three things every audit gives you.

Deliverability early warning

Bounce drift is flagged the moment it crosses 3% — not three weeks later, when inbox providers have already made up their minds about your domain.

Per-campaign truth

A healthy 6.8% blended reply rate hid a campaign sitting at 3.4%. Every campaign is scored against its own baseline, so the average can't cover for the one that's dying.

A trend you can defend

Five weeks of reply volume, week over week. "Outreach feels slow" becomes 118 → 157 and a named cause you can take to a standup.

Who's behind this

Built by operators who cooked a domain, not by a deliverability consultant.

Twin Labs · Growth team

Auditing cold-email programs weekly since 2025.

We ran a 5% bounce rate for three weeks because nobody was looking. By the time the replies dried up, the domain was finished and the only fix left was buying a new one. Sendline is the checkup we wish had been running the whole time: read-only, every Saturday, impossible to forget.

Pricing

Audit once for free. Then never miss a Saturday.

One run is one full audit of every active campaign — not priced per campaign, per send, or per seat.

Weekly campaign health audit

Free Audit

$0.00

1 runs included · one time

Included plan · added automatically after verified sign-in

Weekly campaign health auditMost popular

Weekly Audit

$39.00

4 runs included · every 7 day(s) · every 1 month(s)

Card handled by Stripe · read-only access, never sends a message · reply to any delivery email for support.

FAQ

The three things people ask first.

Can it send, pause, or edit anything?

No. Read access to campaign stats is all Sendline asks for and all it gets. It writes reports and rows in your own audit tables — it never touches a campaign, a sequence, or a contact.

Which sending tool do I need?

Any tool you can grant read access to campaign stats. Connect it once during setup and the audits run on schedule from then on. If the connection ever breaks, the audit says so instead of reporting a silent zero.

What exactly gets flagged as at-risk?

Two thresholds, both printed on every flag: a bounce rate over 3%, or a reply rate that fell more than a third against that campaign's own four-week baseline. Webinar Invite above tripped the second one at −38%.

Find out what Sendline would have told you last Saturday.

The first audit is free, runs the same day, and shows your real per-campaign numbers before you pay anything.

Run your free audit

Same-day audit · read-only · no card required