Deliverability tools built into the outreach workflow.
Protect outbound email performance with CarcMail's deliverability suite for warmup, DNS health checks, sender limits, and spam-risk review.
Support sender warmup and safer volume ramping.
Review SPF, DMARC, MX, and sending-readiness signals.
Use pre-send checks to catch risky copy before campaigns launch.
Protection at every layer of the send path
Deliverability isn't a setting you turn on. It's a series of checks that run before, during, and after every campaign. CarcMail makes those checks automatic.
- 01 DNS authentication check
Before a sender identity goes live, CarcMail verifies SPF, DMARC, and MX records. A missing or misconfigured record blocks the inbox from sending until it's resolved.
- 02 30-day sender warmup
New inboxes enter a 30-day warmup ramp. Daily send volume increases gradually to build reputation with receiving mail servers before full-volume campaigns begin.
- 03 Pre-send spam score
Every email is scored against a spam-language model before it sends. High-risk phrases, dense link patterns, and format red flags are caught at the draft stage.
- 04 Daily volume limit enforcement
Each plan enforces a hard daily send cap (40 / 250 / 900 depending on your tier). CarcMail paces sends across the day to avoid hourly bursts that trigger rate limits.
- 05 Bounce circuit breaker
If your bounce rate crosses 0.8% over the trailing 30 days, the campaign auto-pauses. You get a clear notification — not a vague deliverability warning two weeks later.
- 06 List-Unsubscribe header enforcement
Every outgoing email includes a properly formatted List-Unsubscribe header (both mailto: and one-click HTTP variants) in compliance with Google and Yahoo bulk sender rules.
Deliverability decisions that protect your domain
SPF + DMARC + MX verified before first send
Senders can't go active with broken DNS. The check runs on every inbox connection and must pass before the inbox joins any campaign rotation.
Warmup that mirrors real inbox behaviour
The 30-day ramp is calibrated to match how Gmail and Outlook establish sending trust. No aggressive shortcuts that burn the domain before the first real campaign.
Bounce protection with a 30-day window
The bounce circuit breaker looks at a rolling 30-day window — not all-time history. Older bounces don't punish active, healthy campaigns.
Compliant unsubscribe on every path
List-Unsubscribe headers go on cold emails, follow-ups, newsletters, and reply sequences. One-click unsubscribe is built in — not bolted on after a compliance review.
What is email deliverability suite?
email deliverability suite in CarcMail refers to the structured pipeline stage that handles deliverability tools built into the outreach workflow.. It runs automatically for every lead in a campaign — validated, AI-drafted, spam-checked, and logged before any email leaves the platform. The workflow is built on a 7-node LangGraph orchestration layer powered by In-House AI, running over SMTP or Google OAuth sender identities with SPF, DMARC, and MX authentication enforced at the inbox level.