P·04Outbound email
Cold email infrastructure that actually lands.
MailFlow runs outbound end to end: SMTP accounts, domain authentication, a warmup engine, campaign scheduling, reply sync, and analytics, behind one REST API. Reputation is built before volume, not after bounces.
- Warmup engine included
- SPF · DKIM · DMARC tooling
- Reply sync over IMAP
- v1 REST API
MAILFLOW · WARMUP · NORTHLOOP.IO
3 mailboxes · auto paused on signal drop
Illustrative sample. Real dashboards show per-mailbox health history and pause events.
01Infrastructure
Deliverability is an engineering problem.
Most cold email fails before the first sentence is read. MailFlow treats the mailbox, the domain, and the schedule as one system.
F·01
Warmup engine
Every mailbox builds sender reputation on a schedule that mimics human rhythm: gradual volume, replies, folder moves, and healthy engagement signals, paused the moment a signal degrades.
F·02
Domain authentication
SPF, DKIM, and DMARC verification per sending domain, with tracking of the records that actually resolve, so a misconfigured domain never ships a campaign.
F·03
Campaigns and scheduling
Sequences with per-mailbox throttling, time-zone windows, and pause rules. Reply detection stops a sequence the moment a human answers.
F·04
Reply sync over IMAP
Replies land back in the platform from every connected mailbox, so conversations and bounces are one dataset, not a inbox-diving exercise.
F·05
Analytics that hold up
Opens, clicks, replies, and warmup health per mailbox and campaign, with CSV export for the numbers your team reports on.
F·06
One REST API
Accounts, campaigns, warmup, and analytics behind an authenticated v1 API, plus webhooks and cron-driven background jobs for anything you orchestrate yourself.
02Fit
Built for teams that send like a product, not a spray.
If email is a channel you measure, MailFlow is the infrastructure layer: deterministic, observable, and API-first.
- Outbound teams running multi-mailbox sequences on their own domains
- Sales ops teams that need deliverability health beside pipeline metrics
- Products that send customer-adjacent email and need warm, authenticated infrastructure
- Agencies running outbound for clients with per-domain isolation
03FAQ
What senders ask first.
If yours is not here, ask us directly. We answer with sources.
A new mailbox or a domain with no sending history starts with zero reputation, and volume before reputation is how domains get land in spam folders. Warmup builds the reputation signal gradually, with engagement patterns mailbox providers treat as healthy, before your first campaign sends.
Start
Put your sender reputation first.
Connect a domain, run warmup, and watch the health dashboard fill before your first campaign. Plans and onboarding live in the app; talk to us for volume and agency setups.