Glossary
Email Deliverability — plain English explanation
The likelihood that your emails actually land in the inbox rather than the spam folder.
What it is
Email deliverability refers to the ability of an email to successfully reach a recipient's inbox rather than being filtered into spam, junk, or promotions folders, or being silently blocked by mail servers entirely. Deliverability is determined by a combination of technical factors (DNS records, sending infrastructure, IP reputation) and content factors (spam trigger words, image-to-text ratio, unsubscribe link presence). A business can have excellent email content and still achieve poor deliverability if the technical setup is incorrect — meaning emails that were never opened were never even delivered.
Why it matters for small businesses
For a small business, poor email deliverability is a silent killer. You send a campaign to 300 contacts and see a 5% open rate — not because your subject line was bad, but because 60% of your emails landed in spam and were never seen. Without deliverability monitoring, this problem is invisible. Most businesses assume low open rates mean bad content when the real problem is the emails not being delivered at all.
How Genju implements it
Genju uses Resend for email delivery — one of the most reputable email infrastructure providers, with automatic setup of DKIM, SPF, and DMARC authentication records on your sending domain. These three DNS records are the primary technical requirements for inbox delivery. Genju also implements safe sending limits (maximum 5 emails per day per domain for new accounts, increasing as domain reputation builds) to prevent the domain from being flagged as a spam source.
In practice
A new Genju user tries to send a review request campaign to 80 past clients all at once from a brand new email domain. Without safe sending limits, this would likely trigger spam filters at major email providers and get the domain blacklisted. Genju instead queues the sends at a rate of 5 per day, building domain reputation gradually. By day 16, all 80 have been sent with an average 71% open rate.