holymailer

Knowledge Base

Key concepts, processes, and metrics to help your team work with Holymailer's ready-made email infrastructure.

Infrastructure Basics

Ready mailboxes, delivery batches, and domain pools

  • Ready mailbox — an email account with SPF, DKIM, DMARC, MX, and forwarding pre-configured
  • Delivery batch — a set of domains and mailboxes prepared in a single order
  • Domain pool — a group of domains linked to your mailboxes with automatic registration and DNS management

Setup and Automation

DNS configuration, export, resource rotation, and monitoring

  • Auto DNS setup — automatic configuration and verification of DNS records
  • Export and connection — CSV export and IMAP/SMTP integration with outreach platforms
  • Resource rotation — automatic preparation of backup domains when provider warnings are received
  • Daily monitoring — a control panel tracking DNS status, blocks, and spam metrics

Key Infrastructure Metrics

Deliverability, bounce rate, spam rate, and replacement speed

  • Deliverability — share of emails reaching the inbox (maintained at 95%+)
  • Bounce Rate — percentage of emails returned with an error (kept below 2%)
  • Spam Rate — share of spam complaints per mailbox
  • Replacement time — speed of issuing new domains and mailboxes after a block

Legal and Operational Requirements

GDPR compliance, unsubscribe policy, and secure access

  • Legal basis — lawful grounds for sending emails are required
  • Data handling — GDPR-compliant data processing
  • Unsubscribe policy — unsubscribe links are recommended in every email
  • Access security — secure credential transmission for all connections

Integrations and Workflows

Outreach platforms, CSV export, and webhook notifications

  • Outreach platform compatibility — Instantly, lemlist, Outreach, Reply.io
  • Export and audit — CSV export with credentials and access details
  • Webhook notifications — alerts when domain changes occur
  • Team distribution — package allocation across projects and teams

Email marketing academy

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Copywriting

Guide to writing copy for cold email campaigns

Deliverability

How we maintain deliverability for ready mailboxes

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