Make sure the emails arrive

A subscription that lands in a spam folder is indistinguishable from no subscription. This page is the fix, and it takes about a minute. There is nothing to sign up for here — if you are reading this you have already subscribed, and the problem is on the receiving side.

The one thing that matters

Mark one message from hello@landedmath.com as not spam, and add that address to your contacts. Those two actions teach the filter permanently. Everything below is the same instruction for a specific client.

Signs the filter is holding your mail

By email client

Gmail

  1. Open the spam folder and find a message from hello@landedmath.com.
  2. Open it and click Report not spam. This trains the filter for that sender.
  3. Then add the address to contacts: Contacts → Create contact.
  4. If you use filters, create one matching from:(hello@landedmath.com) and set Never send it to Spam.

Outlook / Microsoft 365

  1. Right-click the message and choose Junk → Not Junk.
  2. Add hello@landedmath.com to Safe senders and domains under Settings → Mail → Junk email.
  3. If your organisation manages the filter, the same list may be controlled centrally — see the section below.

Apple Mail

  1. Open the message and choose Mark as Not Junk, then move it to the inbox.
  2. Add hello@landedmath.com to a contact card, or to Mail → Settings → Rules.
  3. On iCloud, Mail → Preferences → Rules can move matching messages to the inbox automatically.

Corporate filters (Proofpoint, Mimecast, Barracuda)

  1. These act before your mailbox, so the client-level steps will not be enough.
  2. Ask IT to allowlist the sending domain landedmath.com.
  3. If they need a justification: it is a research subscription you signed up for, one email per change, with an unsubscribe link in every message.

Why this happens

An email from a sender you have never corresponded with, sent through a bulk provider, looks to a filter like the shape of spam. It is not a judgement about the content — the first message from any new publication lands in the same place. The fix is to tell the filter otherwise once, which is what the steps above do.

The site sends no tracking pixels and no third-party analytics, so it cannot see whether a message was opened or whether it went to spam. That is a deliberate trade: the privacy page promises no tracking, which means deliverability problems have to be reported by you rather than detected by us. If something is not arriving, say so.

What the emails contain

One message when a tracked change actually moves a per-unit cost — not a daily digest and not a weekly round-up. Each one names the instrument, states the figure with its retrieval date, and gives the arithmetic. There is an unsubscribe link in every message.