Mailserver migration - Best Practice - Checklist for a nice migration

Howto
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This is a draft, inspired from Spamassassin Bayesian filter issues

Mailserver migration howto

  • Data collect for get all the informations needed
  • Steps to be done to install, add modules, configure data, users and aliases
    Steps for migrate mailboxes and preferences (import from files, POP3/IMAP collect, IMAP transfer via client)
  • Steps for protect server (antivirus check, fail2ban setup, password set)
  • Steps for start data transfer to the real world (DNS, MX Record, port forwarding)
  • Steps for improve reputation for not being marked as spam (TLS Certificate, SPF, DKIM, DMARC)
  • Steps for improve SPAM detection
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