- Home
- Email Deliverability Software
- SenderSignal
SenderSignal
8 The Green, Dover, Delaware 19901, USA
What it is
SenderSignal is a web service for email reputation building, blacklist and deliverability monitoring, and inbox placement testing. Inbox Boost can provision a dedicated sending server and generate and publish SPF, DKIM, and return-path records through connected Cloudflare, Name.com, GoDaddy, or Dynadot accounts. Automated warmup follows a plan-based sending ramp with engagement signals and pauses if the bounce rate crosses a threshold. Placement tests report where a real email lands across Gmail, Google Workspace, Microsoft 365, Yahoo, Zoho, and AOL. Email alerts are available on all plans; Slack and HMAC-SHA256-signed webhooks are available on Professional and above. PagerDuty, Microsoft Teams, and Discord are listed as rolling out. The free tier includes two monitored domains, email alerts, and two inbox placement credits each month, with no credit card required. New workspaces start with a 30-day trial that includes deliverability monitoring. Assets above plan limits pause after a seven-day grace window, and Inbox Boost volume is metered by monthly credits and capped by plan. Use cases listed include agencies, e-commerce, SaaS and transactional email, cold outreach, and high-volume sending.
For and against
For
- Free tier monitors two domains.
- Includes two inbox placement credits monthly on free.
- Tests placement across six listed email services.
- Inbox Boost can configure DNS records through connected providers.
- New workspaces receive a 30-day trial.
Against
- Assets over plan limits pause after a seven-day grace window.
- Inbox Boost volume is capped by plan credits.
- PagerDuty, Microsoft Teams, and Discord alerts are still rolling out.
The verdict
SenderSignal combines deliverability monitoring, inbox placement testing, and sending warmup, with a free tier and a 30-day trial. Check plan limits carefully: excess assets pause after the grace window, and Inbox Boost use is capped.
Who it suits
SenderSignal may suit teams managing email deliverability for agencies, e-commerce, SaaS, transactional email, cold outreach, or high-volume sending. The free tier provides basic domain monitoring and a small monthly placement-test allowance.
Plans and prices
Business
Up to 10 monitored domains/IPs · 5 Inbox Boost domains · 20 Inbox Intelligence credits/month · checks every 6 hours
Read 2 Oct 2026 · sendersignal.com
Enterprise
Unlimited monitored domains/IPs and Inbox Boost domains · custom credits · checks every 15 minutes · unlimited team members
Read 2 Oct 2026 · sendersignal.com
Growth
Up to 30 monitored domains/IPs · 10 Inbox Boost domains · 50 Inbox Intelligence credits/month · checks every 1 hour
Read 2 Oct 2026 · sendersignal.com
Professional
Up to 5 monitored domains/IPs · 1 Inbox Boost domain · 10 Inbox Intelligence credits/month · checks every 24 hours
Read 2 Oct 2026 · sendersignal.com
On the record
- Audience
- The site presents use cases including agencies, e-commerce, SaaS and transactional email, cold outreach, and high-volume senders.sendersignal.com · read 2 Oct 2026
- Automated warmup
- Inbox Boost runs a plan-based sending ramp with engagement signals and pauses automatically if the bounce rate crosses a threshold.sendersignal.com · read 2 Oct 2026
- DNS setup
- Inbox Boost provisions a dedicated sending server and can generate and publish SPF, DKIM, and return-path records through connected Cloudflare, Name.com, GoDaddy, or Dynadot accounts.sendersignal.com · read 2 Oct 2026
- Free tier
- The free tier includes two monitored domains, email alerts, and two inbox placement credits per month, with no credit card required.sendersignal.com · read 2 Oct 2026
- Integrations
- Email alerts are available on all plans; Slack and HMAC-SHA256-signed webhooks are available on Professional and above.sendersignal.com · read 2 Oct 2026
- Maker
- The pricing page identifies SenderSignal as a product of Info Science Labs.sendersignal.com · read 2 Oct 2026
- Other alert channels
- The alerts page lists PagerDuty, Microsoft Teams, and Discord as rolling out.sendersignal.com · read 2 Oct 2026
- Placement testing
- Placement tests report where a real email lands across Gmail, Google Workspace, Microsoft 365, Yahoo, Zoho, and AOL.sendersignal.com · read 2 Oct 2026
- Support
- The Professional, Business, and Growth plans list priority support; Enterprise lists priority enterprise support with an SLA.sendersignal.com · read 2 Oct 2026
- Trial
- New workspaces start with a 30-day trial that includes deliverability monitoring.sendersignal.com · read 2 Oct 2026
- Usage limits
- The pricing page says assets above plan limits pause with a seven-day grace window, and Inbox Boost volume is metered by monthly credits and capped by plan.sendersignal.com · read 2 Oct 2026
- What it does
- SenderSignal offers email reputation building, blacklist and deliverability monitoring, and inbox placement testing.sendersignal.com · read 2 Oct 2026
