Email Detective for Outlook: Identify ESPs & Check Authentication

Description

Detects which of 200+ email services (ESPs) sent any email in Outlook web, plus SPF, DKIM and DMARC checks. See which ESP sent any email in Outlook. Detects 200+ providers and shows SPF/DKIM/DMARC authentication. Ever wonder which email marketing tool a company uses? Email Detective tells you instantly. Open any email in Outlook on the web and see a "Sent via Mailchimp" (or Brevo, etc.) badge right on the subject line. Click it for details: vendor website, authentication status (SPF, DKIM, DMARC), and whether a shared or dedicated IP address was used. WHAT IT DETECTS: -200+ email service providers across marketing platforms, newsletter tools, CRM systems, and transactional email services -Detects Mailchimp, Brevo and many more -Infrastructure providers like SendGrid and Amazon SES, with smart detection that shows the actual marketing platform when possible HTML builders like Stripo and BeeFree ---- Not using Outlook? We also have a version for Gmail: https://chromewebstore.google.com/detail/email-detective-for-gmail/jmflpchhakbogamlbfmlkglnpgfbhidl ---- FEATURES: -Instant ESP (email service provider) detection when you open any email -Clickable badge with ESP details popup -Email authentication checker (SPF/DKIM/DMARC) + BIMI and VMC -Shows whether it's a shared or dedicated IP (where it can be detected) -Works in your inbox list view for previously opened emails -Your email content never leaves your browser -Share anonymous meta data or opt out anytime in settings How to audit your own deliverability in seconds: -Send yourself a campaign from your own email marketing service. -Open it in Outlook, click the "Sent via" label, then "check authentication." -You'll see SPF, DKIM, DMARC and BIMI status laid out cleanly. Anything missing or failing is flagged. PERFECT FOR: -Email marketers researching competitors -Agencies evaluating client tech stacks -Deliverability specialists checking authentication -Anyone curious about the tools behind the emails they receive YOUR PRIVACY: -Every email is analysed right in your browser. Its content, subject line and your email address are never sent anywhere. -We never see, store or share your emails. -What we do receive: anonymous stats on how brands send their emails, where they land and how readers engage with them, plus basic usage stats. No email content, no subject lines, no email addresses. -Prefer to share nothing? Switch it off in Settings with one click. -Full details: https://www.emailtooltester.com/en/legal/#detective Built by EmailTooltester.com, the independent email tool review platform with 15+ years of testing experience. Free. No account required. No personal data collected. Please note that the plugin also exists as a Gmail version (Email Detective for Gmail). Changelog v1.2.91 - Improved: recognises the KumoMTA sending software in more emails, and SparkLoop referral blocks under Dynamic content v1.2.90 - Now shows extension feature updates in the popup. - A clearer details popup: the most important risk factors at the top, server details under More details, and it fits small screens - Shows Microsoft's complaint score, and flags 5 or more as a risk factor - Failing DMARC and slow delivery now show as risk factors - More email platforms recognised, including MailCheap and PersonaClick v1.2.88 - Newsletters forwarded through a Google Group are no longer credited to the group's company - More accurate when an email comes from a delivery service's own address - Spots Survicate surveys inside emails v1.2.87 - The automatic full scan no longer stops when you scroll while an email opens - New "Coded with" line for emails built with MJML or React Email - More email platforms recognised: Laposta and Wereldkundig v1.2.86 - New risk factors: subjects that pretend to be a reply, words split into single letters, and a plain-text version that is just HTML code - More email platforms recognised: Oracle Eloqua, Cloudflare Email Service and more - Shorter name for Mailchimp Transactional, and DKIM keys under 2048 bits now show as "older key size" - Spots emails made in SendGrid's own email editor v1.2.85 - Flags emails signed with a weak security key - Spots a sender's own countdown timers and images copied from Gmail - More email platforms recognised: TailoredMail and WordPress.com newsletters v1.2.84 - More accurate badges, and emails opened from search results get theirs again - Warns when an unsubscribe link can't work, and spots text pasted from Word, Google Docs or Slack - More email platforms recognised: Mailkit, Stibee and more - Clearer privacy info when you activate, and the data switch now covers usage stats too v1.2.83 - Detects traces of ChatGPT, Claude or Gemini when the sender pasted from there directly - Spots text pasted from Word or Google Docs, and warns when an unsubscribe link can't work - More email platforms recognised: Maildroppa, Mailkit and more - Clearer privacy info when you activate, and the data switch now covers usage stats too v1.2.82 - Various detection improvements - Recognises Bloomreach in more emails, and shows details for Letter.mx v1.2.81 - New: shows when an email was written with ChatGPT, Claude or other LLMs. What's more, it'll tracking with Litmus and Validity. - Recognises more email platforms and tools, including AhaSend, LiveIntent and more v1.2.80 - Recognises more email platforms, including Adobe Journey Optimizer, FeedBlitz and more - Keeps working on all your Outlook sites when a permission check fails - Other bug fixes v1.2.79 - Better recognition of GetResponse and HighLevel emails - Bug fixes v1.2.77 - New: risk factors in the popup, the warning signs spam filters look for, such as a sender name claiming a brand the address doesn't match - Other bug fixes v1.2.77 - New: hide the badges with one click on the x, and switch them back on in settings - Recognises more email platforms - Other bug fixes v1.2.75 - Improved: clearer DMARC results, including senders with no DMARC record - New senders recognised: Newsletter2Go and ActiveCampaign on more of their sending addresses - Other bug fixes v1.2.71 - Various bug fixes - New ESPs added v1.2.66 - New sending platforms detected: ZeptoMail and Listmonk - KlickTipp is now detected on white-labelled sends - MJML added to email template detection - New setting: check every email automatically (off by default) v1.2.62 - The work Outlook notice can now be dismissed - Work Outlook can also be enabled from Settings at any time - Fixed Focused/Other being misreported in non-English Outlook - Header checks no longer depend on English button labels v1.2.60 - Works with Outlook for work and school accounts - Existing users can switch this on from the popup, no reinstall v1.2.58 - Fixed the extension needing a page refresh after it updates - Detects MoEngage, RD Station, Shopware and one more v1.2.54 - Fixed Proton Mail being reported as Postmark - Fixed a reply being credited to the newsletter it quoted v1.2.52 - Three more email platforms detected: SynXis, SMTP.com and one more (that I can't name, otherwise Chrome Web Store will say again that I am keyword spamming 🙈) - Other bug fixes v1.2.51 - Detects Cheetah Digital, MailUp and HighLevel as ESPs - Inboxroad senders are now correctly identified as Infobip - Fixed a bug where the authentication check failed on emails with very short subjects v1.2.50 - Important update: now recognises eleven more email tools: Mailrelay, Acumbamail (and more). v1.2.49 - Detects two more sending platforms (Action Network, Mapp) - Other minor improvements v1.2.48 - Shows which certificate a sender holds (VMC or CMC) - Warns when it has expired or expires soon v1.2.47 - Fixed the provider popup drifting out of place when scrolling - Fixed opened emails being counted twice in sender statistics - Added detection for Qualtrics and improved it for Bloomreach v1.2.46 - Fixed authentication not loading on emails with accented subject lines - Fixed a false "very slow delivery" warning on scheduled and queued sends - Fixed a false "secondary DKIM" warning - Fixed forwarded emails losing their SPF result - Added detection for Knak and four countdown-timer tools v1.2.45 - Fixed emails being labelled with the wrong service when their subject line mentioned an email tool's name - Fixed a false "broken authentication" warning - Improved detection for Mailmodo v1.2.44 - Improved delivery-time measurement and wording - More accurate sender-domain matching - Added iPost and Knak detection v1.2.43 - Redesigned the activation screen - Updated provider count to 170+ v1.2.42 -Added SendX and Zeta Global as detected ESPs -Fixed a missing Brevo icon in the popup v1.2.41 -Detects BonLoyalty and Nutshell -Fixed authentication checks failing for some French and Portuguese Outlook users -Fixed a bug where a missing DMARC record could show as unclear instead of flagged v1.2.33 -Detects Maileon and E-goi as ESPs, plus 4 more countdown-timer/live-content vendors: Sendtric, CountdownMail and more. v1.2.31 -More accurate delivery-time measurement v1.2.31 -More accurate detection for brands that use Intercom for both marketing and support emails. -Detection improvements. v1.2.30 -Detects forwarded emails, manual and auto-forwarded, across GMX/Outlook/Gmail/Yahoo/Apple Mail, and stops crediting the forwarder as the original sender. v1.2.28 -The activation screen now appears in in several languages based on your browser language. v1.2.27 -New detections: Haihaimail, Blastmail, Easypromos -Removed the expired ActiveCampaign discount -Fixed a bug where the previous email's badge could stick when switching emails v1.2.26 -Added detection for ActionKit -Behind the scenes tracking additions v1.2.24 -Behind-the-scenes improvements v1.2.23 -Added TurboSMTP detection. DMARC warnings now trigger on missing records too. v1.2.19 -Improved support for a range of non-English languages -Behind-the-scenes improvements v1.2.14 -Fixed a bug for French users that triggered the immersive reader -Renamed Sarbacane / User.com / Positive Group to "Positive User" v1.2.12 -New detection for Inflection.io, Resend (when sent via Amazon SES), and IdoSell -Forwarded emails now handled correctly: shows the original sender's SPF result and labels the message as forwarded, instead of showing a false "pass" -Further detection improvements v1.2.8 -Smaller bug fixes and under the hood changes v1.2.2 -Extension doesn't freeze anymore after detecting many consecutive emails -No more false DMARC "passes" -Two false alarms cleaned up (rapidmail and Sarbacane were flagging when they shouldn't) -Now also spots two more tools: Creatio and Elastic Email v1.1.3 -MDirector and Revinate added to detection. -Fixed the popup sometimes closing when you clicked "More details" + some additional polish. -Discount links added for Beehiiv and Brevo. v1.1.2 -We now detect Edrone, a Polish e-commerce marketing platform. -Sharper detection for ExpertSender, Retarus, and Bloomreach -Behind-the-scenes work to keep detection reliable across Gmail and Outlook. v1.1.1 -We now detect 6 more email services (Lindris, XCAMPAIGN, EmailLabs, and Euromessage). Plus behind-the-scenes work so detection stays in sync across Gmail and Outlook. v1.1.0 -Sender tech, one click away. The email card now has a "More details" expand showing the sending setup: the MTA powering it, Return-Path, CSA certification (if existing), TLS, and the send date. -Sharper detection. More cleanup of plain domain names that could cause false matches. v1.0.25 -SPF/DKIM/DMARC/BIMI now check automatically when you open the popup on a detected email. No extra click needed. v1.0.23 -Popup now matches the Gmail version: ESP favicons, a stacked inbox vs junk placement bar, and an Authentication tab. -More accurate ESP detection: removed a batch of overly broad patterns that could tag the wrong provider. -Better authentication reads: fixed a case where a "From" address split across two lines made SPF/DKIM/DMARC show as failed when it actually passed. -Pepipost now labeled under its current name, Netcore. -Small polish on the in-email "Wrong detection?" report. v1.0.15 -Further detection improvements (new ESPs added) -Beefree SDK vs RGE Studio builder detection + the Postcards builder added -Other minor fixes v1.0.13 -Detection improvements. Previously detected labels won't disappear anymore. v1.0.10 -Various bug fixes and faster detection v1.0.4 -Minor improvements

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