SPF, DKIM, and DMARC for cold email
What each record proves, how alignment works, and which setup mistakes cause avoidable authentication failures.
MailSequence guides
Practical cold-email guidance grounded in provider rules and product behavior.
Understand domain authentication, mailbox ramp-up, sending limits, sequence design, reply-aware stopping, provider connections, migration, and the operating controls behind a responsible outbound system.
Primary sources·Visible review dates·No placement guarantees
Start here
Build the sending foundation in the right order.
How long should mailbox warmup take?
Learn which signals set the timeline and how MailSequence's configurable ramp works.
Cold-email sending limits by provider
Learn why provider ceilings are poor daily targets and how to set safer controls.
Diagnose and intervene
Know what to inspect and when to stop.
Cold-email deliverability checklist
A practical review of identity, audience, message, capacity, suppression, and monitoring before campaign launch.
Why cold emails go to spam
Diagnose authentication, reputation, audience, volume, message, and infrastructure problems in a useful order.
When to pause a cold-email campaign
Separate immediate stop conditions from signals that call for a lower sending rate or a focused investigation.
Bounce rates and suppression
Classify delivery failures correctly, suppress permanent failures, and respond to patterns without inventing one universal threshold.
Domain-health monitoring
Monitor authentication, provider responses, complaints, volume, DNS, and reputation evidence at the right scope.
Who owns cold-email deliverability?
See which safeguards belong to MailSequence, which decisions belong to the sender, and what mailbox providers control.
Build better sequences
Design each step around a reason to continue.
How to structure a cold-email sequence
Build a coherent opening and follow-up path in which every step earns its place and has a defined stopping rule.
How many follow-ups should you send?
Start with a bounded test. Keep later steps only when they add useful replies.
How long should you wait between follow-ups?
Use a practical business-day baseline, then adapt it to urgency, buyer context, time zones, and actual reply evidence.
Stop follow-ups when somebody replies
Connect inbound replies to the right enrollment, stop pending steps, preserve suppression, and route the conversation to its owning inbox.
Test, measure, and review
Improve the operation with useful evidence.
A/B testing cold email when replies are rare
Predefine the outcome, compare stable versions, use comparable audiences, and separate practical value from statistical noise.
Cold-email metrics and definitions
Define delivery, bounces, replies, denominators, dispositions, warmup scope, and health before acting on a dashboard.
Personalization without false familiarity
Use verified business relevance, proportional detail, safe field fallbacks, and human review instead of fabricated intimacy.
Agency campaign QA checklist
Review the client workspace, infrastructure, audience, content, capacity, ownership, migration, and restart criteria.
Developer automation
Connect the workflow and preserve its safeguards.
MailSequence API quickstart
Create a least-privilege key, confirm its identity, read paginated resources, make retry-safe writes, and handle typed failures.
Automate lead import and enrollment
Submit bounded batches, preserve suppression, reconcile outcomes, and enroll eligible contacts into a prepared campaign.
Webhook verification and retry handling
Verify HMAC signatures over raw bodies, deduplicate event IDs, process at-least-once delivery, and recover failures.
MCP setup and agent workflows
Connect one workspace, approve minimum scopes, understand the current tool catalog, and keep consequential writes reviewable.
Agency workspace provisioning
Use an organization credential to create and seed a client workspace, then secure the separate operating key returned once.
n8n, Clay, and Apollo workflows
Distinguish working customer-owned connections from generic API paths and integration foundations that are not yet self-service.
Provider and migration guides
Continue with the workflow you already use.
Google Workspace integration
OAuth mailbox synchronization, independent SMTP readiness, campaign eligibility, replies, and operating limits.
Microsoft 365 integration
Graph permissions, independent SMTP readiness, campaign pools, synchronized replies, and operating limits.
Switch from Instantly
Audit, import, reconnect, test, and cut over while preserving suppression decisions.
Switch from Smartlead
Check compatibility, verify the destination, then expand beyond the first stable campaign.
Turn provider rules into an operating checklist.
Authenticate the domain, connect a business inbox, verify the audience, and begin below the published service ceiling.