InboxSys

What InboxSys is

InboxSys is an email deliverability service for checking inbox placement and identifying technical, authentication, content, and reputation issues. Campaign tests use seedlists to show where messages land at Gmail, Yahoo, Outlook, AOL, and other providers. Technical checks cover DMARC, SPF, DKIM, MX, alignment, and compliance; content analysis examines links, image URLs, text, and HTML versions and offers improvement suggestions. The service also monitors IP reputation against checks that include SNDS, Sorbs, Spamhaus, Barracuda, Spamcop, and DNSWL. Plans differ in monthly test and IP allowances: Sender includes 100 tests and 15 IPs, Agency 2,500 tests, 500 IPs, and 10 subaccounts, while ESP provides 25,000 tests, 5,000 IPs, and 90 subaccounts. Agency includes IP grouping, trends, and PDF/CSV reports; ESP includes API access. InboxSys offers web and API access, and its REST API can connect with a customer’s software. Pricing starts at €225 quarterly for Sender, with a 14-day trial and no free plan. A hosted DMARC monitor is available on request, and a white-label option serves ESPs and large-volume senders with branded logos, subaccounts, and dedicated-server hosting.

Who it suits

InboxSys suits email senders and teams that need inbox placement, authentication, content, or IP reputation monitoring. Agency features serve teams handling multiple accounts, while ESP and white-label options are aimed at providers or large-volume senders managing multiple mailstreams or clients.

Limits

Sender includes 100 tests per month and an IP limit of 15. Agency allows 2,500 tests per month, 500 IPs, and 10 subaccounts; ESP allows 25,000 tests per month, 5,000 IPs, and 90 subaccounts.

Getting started

1. Visit the InboxSys website.
2. Choose a plan that fits your test, IP, and subaccount needs.
3. Use the 14-day trial to begin without a free plan.
4. Access the service on the web or through the API where included.
5. Contact support to test delivery to an ISP not already on the seedlist.
6. Request the hosted DMARC monitor if needed.

Verdict

Choose InboxSys if you need email placement and authentication checks, with plan limits that match your sending volume. Look elsewhere if you require a free plan; the paid plans start at €225 quarterly for Sender.