Skip to Content
ThreeStrands
Features Privacy Roadmap Docs
Download

Docs

Contacts

Keep profiles, groups, and Keep in Touch reminders for the people you write to, and bring your address book in or out with CSV or vCard.

Browse docs

Start

  1. Overview
  2. Getting Started
  3. Your First Ten Minutes

Daily work

  1. Today
  2. Reading and Triage
  3. Writing Mail
  4. Search
  5. Calendar
  6. Tasks and Goals
  7. Contacts
    1. The Address Book
    2. Groups
    3. Keep in Touch
    4. Merge Duplicates
    5. Import and Export
  8. Files

Setup and data

  1. Mail Accounts
  2. Proton Mail Bridge
  3. Appearance and Accessibility
  4. Privacy and Local Storage
  5. Settings Transfer
  6. Sync Across Computers
  7. AI Assistance

Help and reference

  1. Troubleshooting
  2. Keyboard Shortcuts
  3. Compatibility
  4. Get Help

    On this page
    1. The Address Book
    2. Groups
    3. Keep in Touch
    4. Merge Duplicates
    5. Import and Export

    Content reviewed for v0.179.0. See changes since your version.

    The Address Book

    Press 4 for Contacts. ThreeStrands builds a record of who you correspond with from your mail. Save someone as a contact to add details, and press Tab to switch between All Contacts, Keep in Touch, and Groups.

    A contact profile with addresses, notes, correspondence history, and shared files.

    Click New Contact to add someone. A profile can hold several email addresses, a role and company, location, birthday, links, notes, and a photo. Click the heart to make someone a favorite; favorites appear first.

    The conversation side panel's recent emails and shared files follow the message you are reading or the recipients you are writing to.

    Groups

    Click New Group to create one, then Add Members. Email Group starts a new message to everyone in the group. Typing a group's name in To or Cc also offers the whole group, which expands into individual recipients.

    Keep in Touch

    Set a Keep in Touch frequency on a profile, from weekly to yearly or a custom number of days. Email in either direction counts as being in touch. The Keep in Touch view groups people as Overdue, Due Today, This Week, and Later, and shows upcoming birthdays.

    Use Mark Contacted when you've talked another way, or Snooze a reminder for a while. The Contacts icon in the sidebar shows how many people are due. Due reminders also appear in Today (0) beside your tasks and agenda; click a person to open their profile.

    Merge Duplicates

    Click Select, choose two or more contacts, and choose Merge…. Pick the profile to keep; addresses, notes, links, favorites, and groups are combined.

    Import and Export

    Open Manage Contacts…:

    • Import CSV or vCard… shows a preview first. Records that share an email address with an existing contact are skipped.
    • Export CSV or vCard… writes an unencrypted file of your saved profiles. Photos, groups, and Keep in Touch settings aren't included.
    • Manage recipient suggestions… stops an address from being suggested when you write, on this computer only.

    Related guides

    • Writing Mail
    • Today
    • Settings Transfer
    Get help · Report a docs issue

    ThreeStrands v0.186.0

    Docs Changelog GitHub Releases README License Privacy Policy Terms of Service

    Made with love by OpenArc. © 2026 OpenArc LLC. All rights reserved.