SoI had a hell of a time converting my qmail install to dovecot 2.0.5, so I thought I'd pass on what I learned.

1. When using vpopmail, do not use " --disable-many-domains". If you do, you'll need to recompile vpopmail without that setting and use the script found at http://qmailrocks.thibs.com/downloads/scripts/migrate-vpopmail-many-domains to collapse the tables.

2. Switch to mysql authentication. The following snippet works well.

driver = mysql connect = host=/var/run/mysqld/mysqld.sock user=vpopmail password=YOURPASS dbname=vpopmail default_pass_scheme = PLAIN password_query = SELECT CONCAT(pw_name, '@', pw_domain) AS user, pw_clear_passwd AS password FROM vpopmail WHERE pw_name = '%n' AND pw_domain = '%d' user_query = SELECT pw_dir as home, 1008 AS uid, 1003 AS gid FROM vpopmail WHERE pw_name = '%n' AND pw_domain = '%d'

3. When integrating Sieve, vpopmail apparently needs to own auth-master and authdb. (example available on request)

4. If coming from maildrop as the LDA, you can put the following in your maildroprc to allow a gentler transition (or to keep maildrop's ability to call external applications)

test -r /usr/libexec/dovecot/deliver if ( $RETURNCODE == 0) { test -r $HOME/$EXT/.sieve if ( $RETURNCODE == 0) { to "| /usr/libexec/dovecot/deliver -d $EXT@$USER" } } 5. When completely switching, you can either replace the .qmail files or use one of the following in qmail/control/defaultdelivery

|/var/qmail/bin/preline -f /usr/libexec/dovecot/deliver -d $EXT@$USER |/var/qmail/bin/preline -f /usr/libexec/dovecot/deliver -d ${EXT/-*}@$USER -a $EXT@$USER

--

This should allow a final conversion to vpopmail 5.5 (from 5.4.30) with dovecot 2.0.x.. I haven't done that final step yet, but it should now work.

Anyhow, I hope this saves someone a few days of head scratching.

a.