Maildrop Configuration for Uberspace

.maildrop-lists.conf

# sorting for mailing lists by using list-id for foldername

# only apply rules if recipient is mailing@domain.tld
if ( $RECIPIENT =~ /.*-(mailing|lists)@.+/ )
{
  # check if List-ID is present and use it as a folder name
  if ( /^List-ID:.*<(.*)>/:h )
  {
    LISTID=`echo $MATCH1 | awk -F. '{print $1}'`

    log "List-ID: $LISTID"
    FOLDER = "$VUSERMAILDIR/.lists.$LISTID"
  }
}

.maildrop-spam.conf

# sorting for mailing lists by using list-id for foldername

# check blacklist
if ( /^From:\s*(.*)/ && lookup( $MATCH1 , "$HOME/.maildrop-blacklist.txt"))
{
  log "Dropped: Sender is blacklisted\n"
  exit
}

# check spamscore
if ( /^X-Rspamd-Bar: (\+{$SPAMMAX,})$/:h ) 
{
  log "Spam: $MATCH1"
  log "Dropped: Spamscore to high\n"
  exit
}
elsif ( /^X-Rspamd-Bar: (\+{$SPAMMIN,})$/:h )
{
  log "Spam: $MATCH1"
  FOLDER = "$VUSERMAILDIR/.junk"
}

.maildrop-wildcard.conf

# sorting for wildcard inbox *.*@domain.tld by using .*.* as foldername

# recipient contains a '.' in the userpart of the address
if ( $RECIPIENT =~ /((.+)\..+)@.+/ )
{
  # remove mail-namespace prefix
  DIR=tolower(substr($MATCH1, length($NAMESPACEPREFIX)))
  PDIR=tolower(substr($MATCH2, length($NAMESPACEPREFIX)))

  # Make sure that parent folder exists
  `test -d $VUSERMAILDIR/.$PDIR/new && exit 1 || exit 0`
  if ( $RETURNCODE == 1 )
  {
    log "Wildcard: $DIR"
    FOLDER = "$VUSERMAILDIR/.$DIR/"
  }
}

.maildrop.conf

VUSERMAILDIR    = "$HOME/Maildir"
NAMESPACEPREFIX = "ubername-"
SPAMMIN         = "3"
SPAMMAX         = "10"


# logging
logfile "$HOME/maildrop.log"

# check for valid username
if ( $RECIPIENT =~ /(.+)@.+/ && lookup(substr($MATCH1, length($NAMESPACEPREFIX)), "$HOME/.maildrop/users.txt"))
{
  log "Username: $MATCH1"
  FOLDER = "$VUSERMAILDIR/"
}

# mailing list detection and sorting
include "$HOME/.maildrop-lists.conf"

# wildcard sorting
include "$HOME/.maildrop-wildcard.conf"


if ( $FOLDER )
{
  # spam filtering
  include "$HOME/.maildrop-spam.conf"

  # deliver mail
  `test -d $FOLDER/new && exit 1 || exit 0`
  if ( $RETURNCODE == 0 )
  {
    `maildirmake $FOLDER`
  }

  to "$FOLDER"
}

log "Dropped: No valid recipient ($FROM -> $RECIPIENT)\n"
exit