One gate in front of every email
Silah sits between your application and Amazon SES. Count, size, and bounce ceilings are enforced on every message, so a runaway job or a leaked SMTP key cannot burn your sender reputation.
→ MAIL FROM app@customer.com… 250 Accepted
✓ ceilings: daily 50k · monthly 500k · bytes 5G
→ delivered via SES identity mail.customer.com
Hard ceilings, not warnings
Daily and monthly message and byte limits per sending key. Spikes throttle before they become incidents.
Bounce guardrails
When bounces or complaints climb, Silah pauses the key before Amazon SES has to.
Pauses with reasons
Every critical stop lists the held messages and the rule that tripped. Fix, resume, move on.
Built to protect your sending reputation
Silah is a gate, not another inbox. It enforces your limits on every message, then delivers what passes to Amazon SES.
Per-tenant ceilings
Monthly and daily message counts and byte budgets, planned per plan and tightened per tenant.
One identity per key
Each sending key is pinned to one from-address and one source IP, with its own thresholds.
Soft, hard, critical
Soft ceilings alert while sending continues. Hard ceilings throttle. Critical rules pause until resolved.
Bounce guardrails
Bounce and complaint limits stricter than Amazon's, so Silah pauses a key before SES does.
SMTP in, SES out
Point your mailer at Silah's relay with STARTTLS on port 587. Delivery runs through your verified AWS identities.
Upstream by priority
SES first, Brevo as the backup upstream. Priority order is set in one place, per platform.
Spool with re-checking
Mail held by a ceiling spools for up to 24 hours and is re-checked against ceilings before release.
Incidents with context
Pauses come with the held message list and the exact rule that tripped, sent to the right people.
How Silah works
From your mailer to Amazon SES in four steps — with the gate closed behind every send.
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1
Connect your app
Point your mailer at Silah's SMTP relay on port 587 with the key we issued. Nothing else in your code changes.
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2
Set your ceilings
Daily and monthly message counts, byte budgets, and bounce thresholds — per key and per tenant.
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3
Send with confidence
Compliant mail is delivered to Amazon SES. Anything that breaks a ceiling spools and waits — it never floods.
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4
Resolve incidents
Pauses arrive with the held message list and the exact rule. Fix the cause, clear the incident, resume.
Provisioned access
Silah is onboarded tenant by tenant while we bring the first platforms live. Ceilings, identities, and relay keys are set with you directly.
A plan matched to your volume
Monthly message and byte ceilings sized to what you actually send, bounce and complaint guardrails, per-key identities, and incident tooling — one flat price per tenant. SMS and WhatsApp relay arrive with the next milestone.
We reply with a short questionnaire, then provision your tenant and keys.