Email Detective for Gmail: Identify ESPs & Check Authentication
Tools
See which ESP sent any email in Gmail. Detects 190+ providers and shows SPF/DKIM/DMARC authentication.
- Store users
- ≈1K
- Ratings
- 4.9/ 5 15 ratings
Tooltester S.L.
3 listings we've seen · as of 7 Oct 2026. This is the maker name shown on the store, not proof of who owns the company.
Email Detective for Outlook: Identify ESPs & Check Authentication
Tools
Detects which of 190+ email services (ESPs) sent any email in Outlook web, plus SPF, DKIM and DMARC checks.
- Store users
- 112
- Ratings
- 5.0/ 5 2 ratings
Sender Icons for Outlook: Spot important emails faster, click fewer ads
Communication
See every sender's logo next to their emails in Outlook web. Spot the email you're looking for instantly.
- Store users
- 6
- Ratings
- Not rated yet