What is email deliverability and how does it affect cold campaigns?
Email deliverability is the rate at which your outbound emails actually reach the prospect's inbox rather than spam or promotions folders. For cold campaigns sending 2,000 to 10,000 sequences per month, poor deliverability collapses reply rates from 4-8% down to under 1%, killing your pipeline before a single word is read. OnyxSend manages domain warming, SPF/DKIM/DMARC configuration, and sending volume throttling automatically so your sequences land in inbox and convert prospects into qualified meetings.
Evidence and detail
- Campaigns with inbox placement above 90% generate 3-5x more replies than those hitting spam, directly multiplying booked meetings per sequence sent.
- Domain reputation degrades within 72 hours of sending high-volume cold email without proper warmup; OnyxSend's automated warmup protocol protects sender score before any live sequence launches.
- Multi-inbox rotation across dedicated sending domains lets teams scale to 500+ daily sends per campaign without triggering provider-level rate limits or blacklisting.
Related reading
- /blog/how-to-warm-up-a-cold-email-domain
- /blog/spf-dkim-dmarc-setup-guide-for-cold-outreach
- /blog/inbox-placement-vs-open-rate-what-actually-matters
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