Domains and inboxes
- Separate domain(s) for cold outreach
- Domain redirects or hosts a simple site
- Inboxes use real names
- Several inboxes instead of one high-volume inbox
Authentication
- SPF record set
- DKIM enabled and published
- DMARC record set (start with p=none)
- Records verified with a checking tool
Warm-up and volume
- Inboxes warmed up for a few weeks
- Daily volume per inbox kept modest
- Sends spread across the day
- Volume increased gradually
List quality
- Fresh list from a live source
- Emails verified (large or older lists)
- Duplicates and invalid addresses removed
- Targeted to one segment
Content
- Plain text or very light formatting
- One link at most; no attachments
- No image-only emails
- Personalised first line
- Clear opt-out line
Monitoring
- Bounce rate watched daily in the first week
- Spam placement tested with seed inboxes
- Replies tracked by segment
- Pause rule agreed if numbers slip
Learn more: deliverability basics · SPF, DKIM and DMARC