Guide
Work through this list before every new campaign. Each item is something you control.
In short
To keep cold email out of spam: authenticate your domain with SPF, DKIM, and DMARC; send only to verified, relevant contacts; keep daily volume per mailbox modest and steady; write short plain-text emails with few links; include a one-click unsubscribe; and watch bounce and complaint rates, pausing if they rise.
Publish SPF, DKIM, and DMARC on the domain you send from, and confirm they pass.
Remove invalid, role-based, and duplicate addresses. Bounce rates above about 2% are a warning sign.
Only email people whose role makes your message relevant. Relevance drives replies, and replies build reputation.
Keep each mailbox at a modest, consistent daily volume inside business hours, and spread volume across several mailboxes.
Short plain text, one or two links at most, no link shorteners, no attachments on first touch, and an honest subject line.
Include a one-click unsubscribe and suppress those addresses permanently.
Watch bounces, replies, and spam complaints per mailbox. Pause a mailbox when bounces spike and fix the list or DNS before resuming.
Infiara shows SPF, DKIM, and DMARC status, enforces a daily cap and weekday sending window per mailbox, skips duplicates and suppressed contacts on import, adds one-click unsubscribe to every send, and can pause a mailbox automatically on a bounce spike.
Questions
The most common causes are missing SPF, DKIM, or DMARC, high bounce rates from unverified lists, sudden volume spikes, spammy or link-heavy content, and low engagement from poorly targeted contacts.
Tracking pixels and rewritten links add some risk. If deliverability is a concern, test campaigns with fewer links and compare results.
More from Infiara
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