configure passwords for dovecot using the dovecotpw utility

e.g. to do an MD5 password

dovecotpw -s MD5
Enter new password:
Retype new password:
{MD5}$1$sBuR/0tx$HM5lyP3dr5zhBMzJ4D1Tv.

Put the return value into the password file e.g.

example of /etc/dovecot/passwd


rtrr:{MD5}$1$sBuR/0tx$HM5lyP3dr5zhBMzJ4D1Tv.:1001:1001::/home/vmail/myvirtualdomain.id.au/:/bin/false:

Where the fields are

Username:Hashed/crypted Password:UID of virtual mail user (who is running the dovecot process):GID of virtual mail group::/path/to/domain/root/:/user/shell