If you have a VPS.You can read personal message with this code.
PS : "if ( %auth === [YOURAUTH@QuakeNET] ) {"
You can change here your nick or your address. I'm wrote this script in QuakeNet server so script setting setted for QuakeNet auth.
Good Luck

on ^*:TEXT:*:?:{
  set %time ( $+ $asctime(HH:nn:ss) $+ )
  set %nick ( $+ $nick $+ )
  set %message $1-
  /write PMS.txt %time %nick %message
}

on ^*:TEXT:!read:#:{
  set %address $address($nick,5)
  set %action1 $deltok(%address,1,64)
  set %action2 $deltok(%action1,2,46)
  set %action3 $deltok(%action2,2,46)
  set %auth $deltok(%action3,2,46)
  if ( %auth === [YOURAUTH@QuakeNET] ) {
    var %i = 1
    var %x = $lines(PMS.txt)
    if ( %x > 0 ) {
      msg $chan You have %x PM(S).
    }
    while ( %i <= %x ) {
      set %messages $read(PMS.txt,%i)
      msg $chan %messages
      inc %i
    }
    if ( %x == 0 ) {
      msg $chan No PMS.
    }
    else {
      msg $chan All PMS Deleted.
    }
    var %i = 1
    while ( %i <= %x ) {
      write -dl PMS.txt 
      inc %i
    }
  }
  else {
    msg $chan You're Not My Master.
  }
}