For saas transactional email
Transactional Email Deliverability: Receipts, Resets, and Onboarding That Actually Arrive
A marketing email in spam costs you opens. A password reset in spam costs you a support ticket, a login, and sometimes the customer. Inboxes tests and monitors the emails your product depends on.
Inbox placement
96%
··%
· ·
Authentication
checking 130+ blacklists
Sample data. Seed results are estimates, not guarantees.
Transactional email deliverability, defined
Transactional email deliverability is whether the emails your application sends automatically, receipts, password resets, verification codes, onboarding sequences, reach the inbox reliably. Unlike marketing mail, users are actively waiting for these, so spam placement fails silently and shows up as "I never got the email" tickets. The usual causes: shared IP pools on SES, SendGrid, or Postmark where another tenant's behavior drags your reputation down, marketing and transactional mail mixed on one domain so a bad campaign poisons your resets, and auth records that drifted during a provider migration. Inboxes tests your actual transactional templates against live mailboxes at Gmail, Outlook, Yahoo, iCloud, GMX, and Zoho, then monitors your sending domains, IPs, blacklists, and DMARC reports continuously. Results are directional estimates, but they catch the silent failures before your users file them as bugs.
Why it fits
Built for the way you send
See what your shared IP pool is doing to you
On a shared pool, your reputation is partly other people's sending. Placement tests and reputation monitoring show when the pool is the problem, so you can escalate to your provider or move to a dedicated IP with evidence instead of a hunch.
Separate transactional from marketing, and verify it
Best practice is separate subdomains or streams for transactional and marketing mail. Inboxes tests each stream independently, so a spam-folder marketing campaign never gets to take your password resets down with it.
Catch auth drift before users catch it for you
A DKIM key rotation or an SPF include lost in a migration fails quietly. Continuous SPF, DKIM, and DMARC monitoring with report parsing alerts you the day alignment breaks, not the week the ticket volume spikes.
// Who this fits
SaaS and product teams sending receipts, resets, verification codes, and onboarding email through SES, SendGrid, Postmark, or any provider, where "the email did not arrive" is a reliability incident.