13 Reasons & Solutions for Why Your Emails Are Going to Spam

Emails may be routed to spam because of missing SPF, DKIM, or DMARC authentication; spam-like language or formatting; risky links and attachments; inaccurate sender details; misleading subject lines; poor HTML practices; and the absence of a visible unsubscribe link or physical address. Deliverability can also suffer when recipients have not explicitly consented to receive messages, frequently mark them as spam, or show low engagement, as well as when senders use purchased, outdated, invalid, or unengaged contact lists that damage domain and IP reputation. Recommended practices include building permission-based lists through opt-in or double opt-in processes, maintaining accurate sender information, segmenting and personalizing campaigns, removing bounced or inactive addresses, monitoring blacklists and complaint feedback, and providing clear opt-out options. Testing emails before distribution can identify technical, content, and formatting problems that may trigger filters, while email delivery platforms can provide sending infrastructure, monitoring, analytics, and logs to help diagnose deliverability issues.

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