Multi-provider failover
Attach the providers you already trust — SES, SendGrid, Postmark, Mailgun, and more. If one throttles or refuses a send, the next attached provider takes it on the same rule, without a retry from your application.
Read moreIndustries — B2B SaaS
Transactional email your product team can trust.
Transactional and product notifications across every provider you already pay for — with automatic failover.
Transactional at scale
B2B SaaS
Four sendrules capabilities mapped to the pain that defines this segment. Every one of them is on the free plan.
- Multi-provider failover
- One rule per traffic class
- Real deliverability dashboards
- Webhook-driven state
The pain
What you deal with today.
Your onboarding emails, receipts, password resets, and product notifications go through one ESP. When that ESP has an outage — and every ESP has outages — your product silently stops emailing. Users churn, support tickets spike, and nobody notices until Monday.
How sendrules answers
What changes when you route through us.
sendrules puts your application in front of every provider you already trust. One endpoint, several providers behind it, automatic failover the moment one throttles or refuses a send. Your product code stays as it is; the resilience shows up in the routing layer, not in your codebase.
The four capabilities
Feature per pain, not the other way round.
One rule per traffic class
Transactional mail (receipts, resets) sits on its own rule, separate from lifecycle (welcome, dunning) and separate again from marketing. Each rule has its own providers and its own limits, so a marketing burst can never knock out a password reset.
Read moreReal deliverability dashboards
DMARC compliance, sender reputation, blocklist status, and seed-list inbox rate — one view per sending domain, updated automatically. The same numbers your board asks about, without a spreadsheet in between.
Read moreWebhook-driven state
Signed and verifiable events for delivered, bounced, complained, and opened — retried on schedule, replayable from the UI. Wire them into your billing, CRM, or in-app inbox and stop screen-scraping the ESP dashboard.
Read moreWhere it lands
Concrete scenarios you can wire in this week.
- Password resets and one-time codes routed with failover so a single provider outage never blocks a login
- Invoices and receipts with a signed webhook to your billing system the moment the message reaches the inbox
- Product notifications (mentions, digests, alerts) routed by the recipient's inbox provider for best placement
- Dunning and card-decline mail on a stricter rule so it can never share a queue with a marketing burst
- Trial-to-paid nurture with the quality gate weeding out typo'd signup addresses before they eat your provider quota
Also relevant
Other segments with similar shapes.
E-commerce & Retail
Route Gmail buyers, Yahoo buyers, and Outlook buyers each through their best-fitting provider — from the same store.
Marketing Agencies & MSPs
Manage sending for thirty clients on their own provider accounts — one endpoint, per-client rules, no shared credentials.
Sales Development & Outbound
Verify every recipient in-line. Then parse every autoresponder reply for the person actually handling the account.
Recruitment & Staffing
Autoresponders from busy hiring managers routinely name the actual decision-maker. Capture them automatically.
Real Estate & Lead Gen
Property inquiry mail flowing both ways — outbound quality-gated, inbound classified and parsed for the buyer's real coordinates.
Financial Services
Statements, alerts, and regulator-facing correspondence with DMARC monitoring, signed webhooks, and a full audit log.
B2B SaaS teams start on the free plan.
Five thousand messages a month. Every feature above included. Attach your existing provider and see whether the numbers move.