Why are your emails landing in spam?

The four records that decide where your email lands

Record	What it does	What goes wrong
MX	Says which servers receive email for your domain.	Missing after a website move, so nobody can email you.
SPF	Lists the services allowed to send as you.	Two SPF records, or more than 10 lookups, which breaks it for every email.
DKIM	Signs each email so the receiver knows it is genuine.	Never switched on in Google Workspace, Microsoft 365 or Titan.
DMARC	Tells mail servers what to do when checks fail, and reports back.	Missing completely, which Gmail and Yahoo now penalise.

A safe order to fix things

1. Make sure there is exactly one SPF record, and that it includes every service that sends email for you (your mailbox provider, your website, your newsletter tool, your booking system).
2. Switch on DKIM in your email provider's admin panel. It gives you a record to add at your domain provider.
3. Add a DMARC record starting with p=none and a rua= address, so you get reports without blocking anything.
4. After two to four weeks of clean reports, change p=none to p=quarantine.

Why this matters for a small business

Quotes, invoices and booking confirmations are the emails that make you money. If they land in spam, customers think you never replied. Fixing these records takes about half an hour and costs nothing.