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InboxSys

inboxsys.com

From €66.25/mo Free trial WebAPI
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Spec score 7.9 #15 of 31 in Email Deliverability Software

Spec sheet

Purpose
InboxSys helps users authenticate, analyze, and optimize email deliverability so messages land where they should.Read 9 Oct 2026 · inboxsys.com
API
The ESP plan includes API access, and InboxSys says its REST API can integrate with a customer's own software.Read 9 Oct 2026 · inboxsys.com
Support
InboxSys says customers can contact support to test delivery to an ISP not already on their seedlist.Read 9 Oct 2026 · docs.inboxsys.com
Campaign testing
Campaign tests use seedlists to show inbox placement at Gmail, Yahoo, Outlook, AOL, and other providers.Read 9 Oct 2026 · inboxsys.com
Content analysis
Content analysis includes link, image URL, text, and HTML version checks, plus improvement suggestions.Read 9 Oct 2026 · inboxsys.com
Custom integrations
InboxSys says it is open to integrating additional data sources that have an API.Read 9 Oct 2026 · inboxsys.com
DMARC monitor
On request, InboxSys hosts a DMARC monitor using Parsedmarc, Elasticsearch, and a Kibana dashboard, with DMARC and TLSRPT reporting monitors.Read 9 Oct 2026 · docs.inboxsys.com
IP reputation
The service monitors IP reputation and lists SNDS, Sorbs, Spamhaus, Barracuda, Spamcop, and DNSWL among its blacklist and whitelist checks.Read 9 Oct 2026 · inboxsys.com
Reporting
The Agency plan includes IP grouping and trends plus PDF/CSV reports.Read 9 Oct 2026 · inboxsys.com
Security checks
InboxSys campaign analysis checks email authentication and alignment, including SPF, DKIM, and DMARC.Read 9 Oct 2026 · inboxsys.com
Technical analysis
The service checks DMARC, SPF, DKIM, MX, alignment, and technical compliance.Read 9 Oct 2026 · inboxsys.com
White label audience
The white-label offering is aimed at ESPs or large-volume senders monitoring multiple mailstreams, clients, or accounts.Read 9 Oct 2026 · inboxsys.com
White label hosting
The white-label solution can run on its own dedicated server and includes branded logos and subaccounts.Read 9 Oct 2026 · inboxsys.com

Plans and prices

Sender €795 a year €795 yearly or €225 quarterly Test limit 100 / month · IP Limit 15 Read 9 Oct 2026 · inboxsys.com
DMARC monitor €1,500 a year €1.500 yearly Read 9 Oct 2026 · inboxsys.com
Agency €3,495 a year €3.495 yearly or €995 quarterly Test limit 2500 / month · IP Limit 500 · 10 Sub accounts Read 9 Oct 2026 · inboxsys.com
Whitelabel €5,000 a year ESP + €5.000 yearly Available with ESP plan Read 9 Oct 2026 · inboxsys.com
ESP €6,795 a year €6.795 yearly or €1.995 quarterly Test limit 25000 / month · IP Limit 5000 IPs · 90 Sub accounts Read 9 Oct 2026 · inboxsys.com

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