How AISend Protects Your Sending Reputation
The deliverability challenge
Getting email into the inbox — not the spam folder — is harder than ever. ISPs analyze sender reputation, content patterns, engagement, and authentication. Reputation is domain-specific: your domain might do fine on Gmail and badly on Outlook. And reputation is easy to wreck and slow to rebuild — a few percent of bounces, or one complaint spike, and you're in the spam folder for weeks. Most of deliverability isn't magic; it's not doing the things that get you flagged. Here's what AISend actually does about it. No AI, no scoring engine — just guardrails that run on every send.
Authentication, handled
SPF, DKIM, and DMARC are table stakes: without them, Gmail and Outlook treat your mail as suspicious by default. When you add a domain, AISend gives you the exact DNS records — or configures them for you in one click if you use Cloudflare — and won't let you send from the domain until it verifies. That's also why we require a domain you own rather than letting you borrow a shared one: your reputation should be yours, not pooled with strangers who might spam.
Recipient pre-validation: bounces you never take
The fastest way to destroy a sending reputation is bouncing off addresses that never existed. Before a send reaches the provider, AISend checks the recipient: syntax, known disposable domains, and whether the domain has MX records at all. Undeliverable addresses are rejected with a 422 and never leave our system, so a typo in your signup form can't turn into a hard bounce against your domain. Bounces and complaints that do happen go onto a suppression list automatically — a bad address can't be retried into your reputation.
Domain warmup and circuit breakers
A brand-new domain that suddenly sends thousands of emails looks exactly like a spammer, so AISend ramps a newly verified domain automatically — roughly 100, then 300, then 1,000 per day over its first week — before lifting the limit. Underneath that, every account has a circuit breaker: cross about 4% bounces or 0.1% complaints and sending is suspended automatically rather than allowed to run your domain into the ground. Those thresholds are the industry lines ISPs actually watch. And AWS's own reputation metrics are alarmed, so if the whole account trends the wrong way, we know before your users do.
What you can see
Every send emits events — sent, delivered, bounced, complained — visible in the dashboard and pushed to your webhooks, so you can act on a problem instead of discovering it in a support ticket. The honest framing: none of this makes your email better than a well-configured Resend or Postmark account. It means the boring, easy-to-get-wrong parts are on by default, and the failure modes that quietly ruin a domain are blocked rather than logged.
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