SpaceCRM / Blog
Cold Email Deliverability: Cold Email Deliverability: How to Avoid the Spam Folder
Cold email deliverability tactics that keep your messages out of spam. Domain setup, sending patterns, and content best practices for 2026.
Cold email vs marketing email: different rules
Marketing emails go to people who opted in. Cold emails go to people who don't know you. This fundamental difference means cold email requires stricter deliverability practices — you have zero engagement history with the recipient.
Cold email campaigns should be limited to 50-100 sends per day per domain during the first 4 weeks. Exceeding this threshold triggers spam filters even with perfect authentication.
The 3-domain rotation strategy
Use 3 separate sending domains for cold outreach. Rotate between them daily to distribute sending volume. If one domain gets flagged, your outreach continues on the other two while you recover.
Each domain needs its own SPF, DKIM, and DMARC records. SpaceCRM supports multiple sending domains with per-domain warmup tracking.
Testing before you send
Use mail-tester.com or GlockApps to check your spam score before launching. Fix any issues — authentication errors, content flags, or link problems — before sending to real prospects.
SpaceCRM's pre-send deliverability check scans your email content, links, and sending setup before every campaign. Issues are flagged and explained in plain language.