Blocked senders

The blocked senders list is a blocklist of email addresses and domains. When mail arrives from anything on the list, ddx PMO stores it but does not classify it into your registers — so spam and phishing stop turning into risks, actions, and other artefacts.

The list is shared across your whole workspace (every project), and you reach it from Blocked senders in the sidebar.

What a block does

A blocked sender’s mail is still received and kept for the record — it lands in quarantine instead of being processed, and the classifier is skipped. Blocking only affects future inbound mail. It does not delete or hide artefacts, inbox items, or stakeholders that already exist from earlier messages.

Note

Blocking applies to email only. Slack and ClickUp sources aren’t filtered by this list — turn those off under Settings → Modules instead. See Connecting your tools.

Blocking a sender

Choose Block sender and fill in:

• Kind — Specific email address or Whole domain.
• Email address / Domain — the address (spammer@example.com) or the domain (spammer.com).
• Reason (optional) — a note to your future self, e.g. phishing attempt 2026-05-08.

A domain block also catches every subdomain — blocking spammer.com stops mail from mail.spammer.com, bar.spammer.com, and so on. This is useful because senders rotate subdomains, but use it carefully: every address at that domain gets caught, including any legitimate ones.

Matching is case-insensitive and checks both the From and Reply-To addresses, so a benign From with a malicious Reply-To is still caught.

From an inbox item

You don’t have to type the address out. Open any item in a project inbox and use Block sender (that exact address) or Block domain in the item’s actions. The address is filled in for you, and the reason is set automatically.

Unblocking

On the list, each row shows the pattern, your reason, and whether it’s an email or domain block. Choose Unblock to remove it. Mail from that sender will be classified normally again from then on.