Email deliverability guardrails that protect your domain
SalesScope builds email deliverability into every send: one sending limit for each mailbox — warm-up, provider ceiling and your team’s caps in a single number — plus a bounce breaker, domain checks and daily inbox placement tests that catch problems before they cost you your reputation.
- Gmail’s 500 a day, enforced
- Warm-up from 20 a day, up 30% daily
- Bounce breaker at 5% by default
One sending limit per mailbox, enforced on every send
The guardrails that sit between every sequence and your sending domain.
One number, every screen
Mailboxes, sequences and the admin console all show what a mailbox can still send today, and what is limiting it.
Provider ceilings held
Gmail stops at 500 a day, Google Workspace at 1,500 by default and Outlook.com at 300. A Microsoft 365 mailbox’s limit starts at 500, with a warning past 2,000. No mailbox goes above its provider’s ceiling.
Room left for replies
Automated sending stops a little short of the provider’s ceiling — 10 short of Gmail’s 500 — so a rep can still answer a prospect late in the day.
Provider holds respected
When Gmail or Microsoft says a mailbox has reached its limit, SalesScope holds that mailbox until the block lifts instead of sending into it.
Caps per person
An admin can cap what one person sends in a day across all of their mailboxes, or hold their sending entirely.
One emergency stop
A single switch stops all sending for the company. Nothing is cancelled; sequences keep their place until it is turned back on.
Email warm-up that ramps real volume, not fake traffic
SalesScope’s warm-up is a volume ramp, not a warm-up network: instead of trading automated emails with other people’s inboxes, it limits how many real emails a new mailbox may send and raises that number every day.
- Starts at 20 a day by default (an admin can choose 5–300)
- Grows 30% a day — about nine days to the default ceiling
- Levels off at 200 a day by default (50–2,000)
- Switched on or off per mailbox; the provider’s ceiling always applies
Bounce protection that pauses before the damage spreads
SalesScope judges each mailbox on everything it sent in the past 7 days. Once it has at least 50 sends and its bounce rate passes your workspace’s limit — 5% by default — the mailbox goes on hold for a 48-hour cooldown, every active sequence on it pauses, and its owner gets an email with the numbers.
- Paused, never cancelled — every queue keeps its place
- Sequences stay paused until the rest of their audience is validated and someone resumes them
- One bounce suppresses that address across the workspace
- Admins set the limit, the cooldown and the minimum sample
outreach@ridgelinelabs.io bounced 6.2% of what it sent this week — over your 5% limit. The mailbox is on hold for 48 hours and its sequences are paused. Nothing was cancelled: 312 emails wait exactly where they stopped.
Resume unlocks once everything still waiting has been validated.
A daily inbox placement test for every mailbox
An admin marks one or more spare Gmail or Outlook.com accounts as test inboxes. Once a day every other mailbox sends each of them a short, plain email, and SalesScope looks for it a few minutes later: in the inbox, in a tab such as Promotions or Outlook’s Other, or in spam.
- Inbox rate per mailbox over the last 14 days
- Test now sends one straight away
- Never tested against an inbox on its own company domain
- Each test counts toward the mailbox’s day like any send
Sender domain checks with the fix spelled out
SalesScope reads the SPF, DKIM and DMARC records of every domain your mailboxes send from and explains each in plain words. When something is missing or broken, it shows the record to add or the setting to change.
- SPF checked for your provider’s include, broken includes and the 10-lookup limit
- DMARC found by walking up the domain tree
- Domains with a problem rechecked every six hours
- A warning before a sequence launches from a domain without SPF or DKIM
What happens before each email goes out
The address is checked
Nobody unchecked is enrolled, suppressed and held addresses are skipped, and each address gets at most one sequence email a day.
The mailbox is asked for room
The send reserves a slot under the mailbox’s one limit for today, with every layer counted together.
The clock is checked
It waits for the sequence’s sending window, the company’s sending hours and its place in the day’s pacing.
The results feed back
Bounces, replies and unsubscribes update the address, the contact and the bounce breaker before the next send.
What email deliverability means for cold email
Email deliverability is the share of your email that reaches the inbox rather than the spam folder, a tab nobody opens, or nowhere at all. For cold email it rests on four things you control: how much each mailbox sends, how clean your list is, whether your domain is authenticated, and how recipients respond.
Sending limits
Every mailbox provider caps daily sending. As of October 2026, Google’s Gmail help says an account that sends more than 500 emails in a day can be blocked from sending for up to 24 hours, and Google Workspace’s sending limits are 2,000 messages a day per user, 1,500 for mail merge and 500 on a trial account. SalesScope holds every mailbox under its ceiling — Outlook.com at 300 a day, Microsoft 365 from 500 with a warning past 2,000, and SMTP mailboxes at the limit you give them, up to 5,000 — and stops automated sending a little short of it so a person can still reply. The Gmail sending limits guide goes deeper, and the cold email capacity calculator helps you plan volume across mailboxes.
Email warm-up
A brand-new mailbox that jumps straight to hundreds of cold emails a day has no history to vouch for it, so ramp volume up gradually — and when you need more, add mailboxes rather than pushing one harder. The email warm-up guide explains the reasoning.
Bounces and authentication
A high bounce rate is one of the plainest signs that a sender didn’t check its list, so verify before sending and stop as soon as bounces climb; SalesScope’s email verification and its mailbox-level bounce breaker do both. Authentication matters as much. As of October 2026, Google’s email sender guidelines ask every sender to set up SPF or DKIM, and anyone sending 5,000 or more messages a day to Gmail accounts to set up SPF, DKIM and DMARC. The SPF, DKIM and DMARC guide shows the records to publish.
Measuring placement
Bounces and replies tell you whether mail arrived and whether anyone answered, not whether it was filed as spam. The only way to know is to send to an inbox you can look inside: an inbox placement test. For the whole picture, read the cold email deliverability guide.
Frequently asked questions
Is SalesScope’s warm-up a warm-up network?
No. SalesScope’s warm-up is a volume ramp: it limits how many real emails a new mailbox may send each day and raises that limit 30% a day, from 20 to a ceiling of 200 by default. It doesn’t exchange automated emails with other people’s mailboxes to simulate engagement.
What happens when a mailbox reaches its daily limit?
Its emails wait and go out after the count resets at midnight UTC, which every screen shows in your own time. If Gmail or Microsoft blocks a mailbox for reaching its limit, SalesScope holds the mailbox until the block lifts rather than sending into it.
How does the bounce breaker decide?
It judges each mailbox on everything it sent in the past 7 days. Once the mailbox has at least 50 sends and its bounce rate passes your workspace’s limit — 5% by default — it goes on hold for a 48-hour cooldown, every active sequence on it pauses, and its owner is emailed. The sequences stay paused until the rest of their audience is validated and someone resumes them; they are never cancelled. An admin can change the limit, the cooldown and the minimum number of sends.
What do I need for inbox placement tests?
A spare Gmail or Outlook.com account kept for the purpose (both are free), since its owner sees the tests arrive. An admin connects it and turns on “Use as a test inbox”, and every other mailbox sends it one short, plain email a day. Results reflect the mailbox and its domain; a campaign’s own links and images can land differently.
Which mailboxes does SalesScope support?
Gmail and Google Workspace connect by signing in with Google, and Outlook.com and Microsoft 365 by signing in with Microsoft; SalesScope reads all four for replies, bounces and auto-replies. Any other provider connects over SMTP, over an encrypted connection. SMTP mailboxes don’t sync, so SalesScope can’t see their replies or bounce notices.
Does SalesScope check SPF, DKIM and DMARC?
Yes, for every connected mailbox’s domain outside the big free providers. It reads the records from public DNS, explains each result and shows the fix. Domains with a problem are checked again every six hours and the rest weekly, and a sequence warns you before it launches from a domain missing SPF or DKIM. It doesn’t block sending.
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