Dunno how it would be selective and let just a few fru. As you say, probably the leprechauns. What
might fix it is to have a separate address for him to write to you - one with a mailbox that isn't "filtered". If you know how to set your mail programme (Thunderbird/Outlook/Express/MSMail etc) to poll multiple addresses, I can set you up with a mailbox on essexman.org.uk (one of my domains

)
Essex is pleasant at the mo - warming up nicely, expecting 17°C today and 18 tomorrow. Granddaughter 3 arrives about noon for lunch with the wrinklies, followed by a trip to the swimming pool with grandma.