Postfix/Notes_on_converting_a_customer_to_virtual_mailboxes

From work, notes made for an enquiry regarding wave50

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postfixadmin

• postfixadsmin requires virtual mailboxes
• means migrating to virtual mailboxes
• virtual mailboxes are centrally owned

• need to restructure into /domain/user

• virtual mailboxes means virtual delivery
• could maybe stay as mbox, will still need to point to other "folders"
• need to normalise all addresses (will take a few hours at least)

postfix lookups

• postfix needs to back onto the DB
• can shape the queries a little bit, but not that much
• don't have to use Deliver, but it's good

dovecot

• dovecot has to use the DB for mail location now
• dovecot shares that DB for auth now
• this affects SASL
• everyone's SASL credentials may have to change

implementation thoughts

• convert to LDA (postfix -> dovecot -> LDA delivery)

• this would shift out of system users
• need to normalise all addresses first
• difference between passwd file and SQL should be pretty small
• could use imapsync to move all the mail?

time estimates

• address normalisation - 3hrs
• mbox to maildir conversion - 3hrs (some 540MiB of mail)
• planning time so far - 2hrs
• documentation - 2hrs
• setup postfixadmin - 0.75hrs
• populate the DB backend - 2hrs
• configure postfix - 0.75hrs
• configure dovecot - 1hrs
• testing - 2hrs
• pricing - 0.5hrs