macOS Mail extension On-device sentiment markers

Make email tone visible, inline in Apple Mail.

Start your day the way you want: focus on positive replies first, or park challenging threads until later. Sentimentalmail enriches Apple Mail with on-device sentiment scoring so you can triage faster and respond with context.

Get Sentimentalmail See capabilities
On-device Offline-first Deterministic

Capabilities

Seamlessly integrated with Apple Mail. Sentimentalmail scores the sentiment of your messages on your Mac and presents clear markers inline so you can triage with confidence.

Seamless Apple Mail integration

Works inside Apple Mail without changing how you read, search, or organise your inbox.

Sentiment scoring with thresholds

Scores messages and lets you choose thresholds so markers match your inbox and tolerance for negative, neutral, or positive tone.

Marker style selection

Select how sentiment shows up: colour semantics or flag-style markers, depending on how you triage.

Message statistics & trends

Review positive, neutral, and negative counts over time with date-range charts.

Sender filters

Include or exclude sender patterns so scoring focuses on the mail you care about.

On-device processing

Analysis happens on your machine. No message content is sent out and Sentimentalmail works offline.

Clean text extraction

Extracts subject and body, removes HTML markup, and normalises whitespace for consistent scoring.

Localized UI

Localized UI so the interface feels native on your Mac.

SentimentalMail labels settings window with marker styles, score thresholds, and reset controls
Fine-tune label styles, score thresholds, and scoring controls directly inside the app.
SentimentalMail stats window showing weekly positive, neutral, and negative message counts
Review weekly message trends with a date-range picker and clear positive, neutral, and negative counts.

Download

Install in minutes. Enable the extension in Mail → Settings → Extensions.

Enable the Mail extension

  • 1Open Mail and choose Mail → Settings.
  • 2Open the Extensions tab, tick the extension, then confirm Turn On.
  • 3Close Settings and return to your inbox. The change applies immediately.

If Sentimentalmail is not listed, open the app once, then return to Mail → Settings → Extensions.

Mail settings showing the extension enabled in the Extensions tab
Enable the extension from Mail → Settings → Extensions.
Mail confirmation dialog asking to turn on the extension
Confirm Turn On so Mail can use the extension immediately.

Get Sentimentalmail

Download the app and enable the extension in Apple Mail settings.

Coming soon

App Store

Tip: replace the link above with your App Store URL.

System requirements

Basic requirements for a smooth experience.

  • PlatformmacOS 14.6+
  • ArchitectureApple Silicon & Intel
  • IntegrationApple Mail extension
  • ProcessingOn-device