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What this page helps you do

Understand how contacts are stored, why they appear masked, and how to use tags for segmentation. This sets you up to upload contacts and build campaigns confidently.

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Before you start

  • A Nudgen account
  • A CSV file with at least one email address (see upload guide for format)

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How contact data is stored

Nudgen encrypts every piece of personally identifiable information (PII) before it is saved:
  • Emails — AES-256 encrypted. We cannot read them.
  • Names — Encrypted if provided. Optional in your CSV.
  • Custom metadata — Any extra columns you upload are encrypted as well.
We also store a one-way hash of each email for deduplication. Duplicate emails in the same list are merged automatically.

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Masked view

By default, the contact list shows masked values like j***@g***.com instead of real addresses. PII is encrypted at rest; we never see or store plaintext emails or names. Masking protects your data from shoulder-surfing and limits exposure if someone else has access to your screen. Revealing a contact: You (and other workspace members with access) can click Reveal to show the real email and name in the UI. Decryption happens only in your browser when you reveal; after you navigate away or refresh, values mask again. We never display decrypted PII in analytics, logs, or exports.

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Tags and segmentation

Assign tags when you upload contacts or edit them later. Use tags to target specific segments in campaigns:
  • inactive — Users who haven’t logged in for 30+ days
  • vip — High-value or premium customers
  • trial — People on a free trial
When creating a campaign, you choose an audience: all contacts, or only those with certain tags. Tags make it easy to run different sequences for different segments.

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Contact statuses

Contacts can have one of these statuses:
  • Active — Can receive campaigns. Default for newly imported contacts.
  • Unsubscribed — Opted out via the unsubscribe link or manually. They will not receive future campaign emails unless you change their status.
  • Suppressed / Bounced — Delivery failed (invalid address, mailbox full, or provider suppression list). These contacts are automatically excluded from future sends to protect deliverability. Our system syncs with the delivery provider’s suppression list.

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What happens next

Upload contacts

CSV format, validation, and tag assignment.

Create campaigns

Choose audience and launch your first campaign.