Why does business email go to spam?
Authentication failures, reputation, content, and list hygiene — how Melbourne businesses improve inbox placement.
Authentication is table stakes
Missing or broken SPF, DKIM, or strict DMARC alignment is the fastest path to junk folders at Gmail and Outlook. Fix DNS records before blaming “the subject line.”
Reputation and volume
New domains, sudden bulk blasts, high bounce rates, and spam complaints hurt sender reputation. Warm up new marketing domains slowly. Remove invalid addresses. Never buy contact lists.
Content and formatting
All-image emails, URL shorteners, spammy phrases, and broken HTML trigger filters. Balance text and links. Use a proper From name staff recognise. Attachments from unknown senders still get scrutinised heavily.
Infrastructure checks
Confirm reverse DNS for on-prem senders, ensure you are not on blocklists, and separate marketing IP/domain from transactional mail where possible. Re-test after any DNS or mail platform migration.
Try it now
Run the related tools
Need a hand?
Run the tools. Then talk to us.
Use our free diagnostics to see what is wrong, then get Melbourne IT support for the fix.
Keep reading
More guides
Fix SPF for Microsoft 365
Stop legitimate email bouncing or landing in spam by getting your SPF record right for Microsoft 365.
- Why SPF matters
- The Microsoft 365 include
Set up DMARC for your business
Move from none to quarantine with a policy that protects your domain from spoofing without breaking legitimate mail.
- What DMARC actually does
- Start with monitoring