Why is my business email going to spam?

Business email can land in spam because of authentication, sender reputation, sending patterns, message content or recipient-side filtering. Test the exact route and ask your email provider to verify the evidence before changing DNS or repeatedly resending.

There is no single setting that guarantees inbox placement. Work through these 6 checks in order so you can describe the problem clearly, change 1 factor at a time and see whether the result improves.

1. Confirm which email problem you have

Start with the outcome, not the suspected cause.

• Outgoing spam placement: your genuine message arrives in the recipient’s spam or junk folder.
• Incoming junk: unwanted messages arrive in your own inbox. That is a different problem; see this guide to receiving junk after publishing an address.
• Bounce: you receive an undeliverable notice instead of the message arriving.
• Delay: the message arrives late, possibly after passing through a forwarding rule.

Ask the recipient where the message appeared. If you use forwarding, test forwarding delay and delivery separately. Do not treat every slow or missing email as spam placement.

2. Test the exact message and route

Send a normal 1-to-1 test to a small number of known, consenting recipients. If possible, use recipients on different providers, such as Gmail, Outlook and a business mailbox.

Record:

• the sending address and service;
• the recipient’s email provider;
• the date and exact time;
• the subject line;
• any links or attachments; and
• whether the message reached the inbox, spam folder or nowhere visible.

Test the same route your customer message uses. A test from a personal Gmail account tells you little about a quote sent from your business domain. Do not use a bulk send as a diagnostic test, and pause repeated resends to the same person.

3. Ask your provider to verify SPF, DKIM and DMARC

These 3 controls help receiving systems assess whether a service is authorised to send for your domain and what to do when checks fail. They are important, but they are not a guarantee that every message reaches the inbox.

Ask your mailbox or domain provider to confirm:

• which service actually sent the message;
• whether SPF and DKIM passed for the affected message;
• how DMARC is configured and evaluated; and
• whether duplicate, missing or conflicting DNS records exist.

Do not copy a generic DNS record from an article or another business. The correct values depend on your sending service. If provider support matters to your business, use these points to compare provider support and authentication controls.

4. Review reputation and sending behaviour

Authentication can be correct while messages are still filtered. Ask your provider whether the evidence suggests a reputation or sending-pattern issue.

Possible factors include a new domain, a sudden increase in volume, repeated bounces, recipient complaints, an account that has been compromised, or another service sending without approval. These are possibilities, not a diagnosis.

Keep ordinary customer correspondence separate from marketing campaigns. A plumber sending 12 individual booking replies has a different pattern from a platform sending 2,000 promotional messages. If the change was sudden, note what changed just before it started: provider, device, sending service, volume or account access.

5. Simplify the message, 1 factor at a time

Retest with a plain, accurate message that a customer would reasonably expect. Remove unnecessary link shorteners, heavy image blocks and oversized attachments. Use a subject line that describes the real message rather than trying to force attention.

Change only 1 factor per test. For example, send the same quote without the large attachment, then compare the result. If you change the sender, subject, links and attachment together, you will not know what affected the outcome.

There is no universal list of “spam words” that fixes placement. Clear content helps the test, but deleting 1 phrase does not prove the underlying issue is solved.

6. Escalate with evidence, then retest

Give your provider the timestamps, sending address, recipient domains and test results. They may request full message headers, which can show authentication and delivery details. Share headers only through a safe support path and remove personal information if instructed.

Ask what the evidence shows, what changed and when to retest. After the provider confirms a correction, repeat the same small test. Keep an alternate contact path, such as phone or SMS, for time-sensitive customer updates while the issue is unresolved.

A domain, mailbox and forwarding address can each play a different role. This guide explains how those parts work without a website.

If your current address is difficult to say or type, ask Short Mail about a shorter .au option. A suitable address may forward to the inbox you already use, subject to fit, availability, eligibility, setup and provider compatibility confirmed manually. It does not replace your provider’s outgoing-delivery diagnosis.