Deliverability

Deliverability = the percentage of your mail that lands in the primary inbox (not spam, not quarantined, not bounced). SushiSend’s job is to make it high; yours is to follow a few rules.

The short checklist

• DKIM, SPF, and MAIL FROM all verified for every sending domain.
• DMARC record published, starting at p=none and moving toward p=reject as reports confirm everything is aligned.
• Suppression list is enforced — don’t re-add bounced or complained addresses.
• You warm up new domains before blasting (start with small, engaged audiences).
• Content is relevant and expected. Opt-in language on your signup forms matters.

Reputation signals we monitor

The dashboard’s Deliverability page tracks six signals per domain per day:

1. Delivery rate (target ≥ 99%)
2. Hard bounce rate (target ≤ 0.5%)
3. Soft bounce rate (target ≤ 1%)
4. Complaint rate (target ≤ 0.1% — this is the one that gets you blocked)
5. Open rate (healthy is > 20% for B2B, > 30% for B2C)
6. Unsubscribe rate (healthy is < 0.5% per campaign)

We page the workspace owner when complaint rate exceeds 0.3% over any 24-hour window.

Domain warmup

New domains start with 0 reputation. Send to your most-engaged recipients first (team, trial users who signed up recently), ramp to larger lists over 1–2 weeks, and watch the signals above. Scale plan onboarding includes white-glove warmup guidance.

Dedicated IP

A dedicated IP gives you full control over reputation but also full responsibility. Recommended only above ~100k monthly sends with a consistent daily volume.

When something breaks

1. Check the Deliverability page — which signal moved?
2. Look at the recent Messages list — are complaints concentrated in one template or one list?
3. Pause the offending send, fix the root cause (content, list hygiene, unsubscribe handling), resume with a small audience to confirm signals recover.