Why does business email go to spam?
Authentication failures, reputation, content, and list hygiene — how Melbourne businesses improve inbox placement.
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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.
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Common questions
Why does my business email go to spam?
Common causes are broken SPF/DKIM/DMARC, poor sender reputation, blocklists, and suspicious content. Fix authentication first, then check blacklists. See mrtechmelbourne.com/guides/why-business-email-goes-to-spam
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