Deliverability & realtime health

Catch the spam folder
before it costs you replies.

Deliverability fails quietly. The sequence keeps sending, the dashboard looks fine, and your email sits in spam the whole time. ReachHQ scores every mailbox in realtime, 0 to 100, and auto-pauses sending the moment a blacklist hit or spam spike puts a week of sends at risk.

No credit card · One live score per mailbox · Auto-pause on risk

Deliverability health · dana@stackline.io Live
91/100
▲ Healthy · 0 blacklists
Inbox placement97%
Warmup reputation84%
Bounce rate0.4%
SPF DKIM DMARC Blacklists clear
91/100live health score 0blacklists SPF·DKIM·DMARCwatched Auto-pauseon risk
What we watch

Every signal that decides whether you land.

Cold email lands in spam for reasons you never see: a misconfigured record, a fresh blacklist entry, a bounce trend creeping up. ReachHQ rolls all of it into one number per mailbox, watched continuously, so a single score tells you what is safe to send right now.

Live health
91/100

One live score per mailbox

Placement, warmup reputation, spam rate, bounce trend, blacklists and DNS roll into a single 0–100 number, updated in realtime. Green is safe, watch is drifting, at-risk gets paused before it hurts your domain.

Inbox placement97%
Warmup reputation84%
97%

Inbox placement

See where you actually land, primary, promotions or spam, not a hollow delivered count that hides the truth.

0

Blacklist monitoring

Major domain and IP blacklists watched live, Spamhaus, Barracuda, SpamCop, SORBS and more, flagged the moment a new listing appears.

DNS aligned

SPF, DKIM & DMARC

Authentication and sending DNS checked and kept aligned, with the tracking domain validated. A record that breaks later shows up as a red flag, no manual lookups.

<1%

Bounce-rate trend

Watch bounces as a trend, not a number. Get warned as they start climbing, early enough to fix the cause before it spreads.

84%

Warmup reputation

Inbox warmup folds into the same score, so reputation and placement live in one view instead of two disconnected tools.

All mailboxes

One score, every mailbox, no tool sprawl.

Stop stitching a placement tester, a blacklist checker and a DNS validator into a spreadsheet nobody reads. Connect Google, Microsoft 365 or custom SMTP and ReachHQ scores them all from one dashboard, in realtime.

0–100 Per mailboxLive Realtime0 Manual checks All providers
Auto-pause & alerts

Pull the brake before a blacklist hit kills a week of sends.

When complaints climb, bounces trend up or your domain lands on a blacklist, ReachHQ does not wait for you to notice. It auto-pauses the affected mailbox, alerts you before it spreads, and resumes only once the health score recovers. One bad inbox never drags the whole campaign down.

Auto-pause the moment a mailbox drops into the at-risk band
Only the flagged inbox stops, the rest keep sending
Spam-spike and bounce-trend alerts before they spread
Sending resumes automatically once health recovers
See how campaigns pace
Mailbox health Live
dana@stackline.io
91
marcus@stackline.io
89
priya@getstackline.co
74
team@stackline.email
38
⏸ team@stackline.email paused · health 38, spam rate climbing
Health, trending right

Watch reputation climb instead of guessing.

Every signal is tracked over time, so you see the trajectory, not a snapshot. Score up, placement up, bounces and complaints down, blacklists at zero, the picture you want before you scale volume.

Health score
91/100
▲ +7 over 30 days
Inbox placement
97%
▲ up from 82% at connect
Bounce rate
<1%
▼ trending down, kept in check
Spam complaints
0.02%
▼ well under threshold
Blacklists
0
▲ clear across every list
Warmup reputation
84%
▲ ramping toward full health
FAQ

Deliverability health, answered.

How is the health score calculated? +

Each mailbox gets one 0–100 score, rolled up in realtime from the signals that predict deliverability: inbox placement, warmup reputation, spam-complaint rate, bounce trend, blacklist status and SPF, DKIM and DMARC alignment. A healthy inbox sits in the green band, a drifting one moves to watch, and an at-risk one can be auto-paused before it hurts your domain.

What triggers an auto-pause? +

Sending pauses automatically when a mailbox's score drops into the at-risk band, for example when the spam-complaint rate climbs, bounces trend up, or the domain or IP appears on a blacklist. Only the affected mailbox stops, so the rest of your campaign keeps running, and sending resumes once the score recovers.

Which blacklists do you monitor? +

ReachHQ watches the major domain and IP blacklists mailbox providers actually weigh, including Spamhaus, Barracuda, SpamCop, SORBS and other widely used lists. Your sending domain and IPs are checked continuously, and a new listing flags your score right away instead of quietly tanking delivery.

Do you check SPF, DKIM and DMARC for me? +

Yes. ReachHQ checks SPF, DKIM and DMARC for every connected mailbox, validates your sending DNS and tracking domain, and keeps watching them, so a record that breaks later shows up as a red flag. No manual DNS lookups, no remembering to recheck after a change.

Does it work with Google and Microsoft? +

Yes. Realtime health works with Google and Google Workspace, Microsoft 365 and Outlook, and any custom SMTP mailbox. Connect each inbox in a click and ReachHQ starts scoring placement, reputation, blacklists and authentication automatically.

Know your deliverability before it costs you replies.

One live health score for every mailbox, blacklist and spam monitoring, SPF, DKIM and DMARC, and auto-pause on risk. Start free in 2 minutes, no card.